/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:06:20,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:06:20,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:06:20,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:06:20,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 17:06:20,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:06:20,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:06:20,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:06:20,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:06:20,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:06:20,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:06:20,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:06:20,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:06:20,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:06:20,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:06:20,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:06:20,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:06:20,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:06:20,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:06:20,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:06:20,721 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:06:20,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:06:20,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:06:20,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:06:20,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:06:20,971 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:06:20,972 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:06:20,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2022-01-18 17:06:20,973 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2022-01-18 17:06:20,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:06:20,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:06:20,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:06:20,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:06:20,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:06:21,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,023 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:06:21,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:06:21,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:06:21,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:06:21,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:06:21,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:06:21,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:06:21,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:06:21,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:06:21,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/1) ... [2022-01-18 17:06:21,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:06:21,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:21,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 17:06:21,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 17:06:21,105 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:06:21,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:06:21,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:06:21,106 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:06:21,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:06:21,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:06:21,106 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:06:21,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:06:21,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:06:21,108 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:06:21,144 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:06:21,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:06:21,286 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:06:21,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:06:21,298 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:06:21,308 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:06:21 BoogieIcfgContainer [2022-01-18 17:06:21,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:06:21,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:06:21,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:06:21,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:06:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:06:20" (1/2) ... [2022-01-18 17:06:21,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434d15ce and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:06:21, skipping insertion in model container [2022-01-18 17:06:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:06:21" (2/2) ... [2022-01-18 17:06:21,315 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2022-01-18 17:06:21,319 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:06:21,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:06:21,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:06:21,320 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:06:21,362 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 17:06:21,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:06:21,448 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 17:06:21,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 17:06:21,456 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-01-18 17:06:21,479 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 17:06:21,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:21,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:21,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-01-18 17:06:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90167464] [2022-01-18 17:06:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:21,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:21,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90167464] [2022-01-18 17:06:21,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90167464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:06:21,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:06:21,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:06:21,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72649281] [2022-01-18 17:06:21,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:06:21,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:06:21,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:06:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:06:21,667 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:21,700 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-01-18 17:06:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:06:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 17:06:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:21,717 INFO L225 Difference]: With dead ends: 104 [2022-01-18 17:06:21,719 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 17:06:21,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:06:21,728 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:21,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:06:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 17:06:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-01-18 17:06:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-01-18 17:06:21,780 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-01-18 17:06:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:21,781 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-01-18 17:06:21,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,781 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-01-18 17:06:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:06:21,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:21,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:21,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:06:21,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-01-18 17:06:21,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323797742] [2022-01-18 17:06:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:21,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:21,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323797742] [2022-01-18 17:06:21,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323797742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:06:21,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:06:21,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:06:21,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553291596] [2022-01-18 17:06:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:06:21,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:06:21,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:06:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:06:21,881 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:21,914 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-01-18 17:06:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:06:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:06:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:21,916 INFO L225 Difference]: With dead ends: 91 [2022-01-18 17:06:21,916 INFO L226 Difference]: Without dead ends: 83 [2022-01-18 17:06:21,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:06:21,918 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:21,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:06:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-18 17:06:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-18 17:06:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-01-18 17:06:21,928 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-01-18 17:06:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:21,928 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-01-18 17:06:21,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-01-18 17:06:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:06:21,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:21,930 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] [2022-01-18 17:06:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:06:21,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-01-18 17:06:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18859921] [2022-01-18 17:06:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:21,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:22,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:22,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18859921] [2022-01-18 17:06:22,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18859921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291473113] [2022-01-18 17:06:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:22,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:22,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:06:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 17:06:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:22,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 17:06:22,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 17:06:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:22,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:22,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:22,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 17:06:22,652 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 17 treesize of output 13 [2022-01-18 17:06:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:22,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291473113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:22,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:22,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-01-18 17:06:22,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875777638] [2022-01-18 17:06:22,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:22,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:06:22,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:22,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:06:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:06:22,714 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:22,835 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-01-18 17:06:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:06:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 17:06:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:22,841 INFO L225 Difference]: With dead ends: 154 [2022-01-18 17:06:22,841 INFO L226 Difference]: Without dead ends: 137 [2022-01-18 17:06:22,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:06:22,847 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:22,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:06:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-18 17:06:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-01-18 17:06:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-01-18 17:06:22,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-01-18 17:06:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:22,866 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-01-18 17:06:22,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-01-18 17:06:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 17:06:22,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:22,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:22,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 17:06:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:23,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-01-18 17:06:23,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:23,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220904057] [2022-01-18 17:06:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:23,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:23,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:23,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220904057] [2022-01-18 17:06:23,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220904057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170052454] [2022-01-18 17:06:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:06:23,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:23,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:23,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:06:23,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:06:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:06:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:23,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:23,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170052454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:23,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:23,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-18 17:06:23,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906838385] [2022-01-18 17:06:23,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:23,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:06:23,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:06:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:06:23,334 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:23,413 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-01-18 17:06:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:06:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 17:06:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:23,415 INFO L225 Difference]: With dead ends: 284 [2022-01-18 17:06:23,416 INFO L226 Difference]: Without dead ends: 264 [2022-01-18 17:06:23,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:06:23,418 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:23,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:06:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-18 17:06:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-01-18 17:06:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-01-18 17:06:23,435 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-01-18 17:06:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-01-18 17:06:23,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-01-18 17:06:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:23,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:23,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:23,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:23,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 17:06:23,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-01-18 17:06:23,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625812933] [2022-01-18 17:06:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:23,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:23,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:23,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625812933] [2022-01-18 17:06:23,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625812933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:23,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441928299] [2022-01-18 17:06:23,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:06:23,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:23,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:23,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:23,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:06:23,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:06:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:06:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:24,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:24,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:06:24,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:24,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-01-18 17:06:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:25,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:25,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2022-01-18 17:06:25,591 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 17 treesize of output 13 [2022-01-18 17:06:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441928299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:25,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-01-18 17:06:25,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294468692] [2022-01-18 17:06:25,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:25,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:06:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:06:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:06:25,640 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:26,575 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-01-18 17:06:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:06:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:26,578 INFO L225 Difference]: With dead ends: 536 [2022-01-18 17:06:26,578 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 17:06:26,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:06:26,580 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.2s Time] [2022-01-18 17:06:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 17:06:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-01-18 17:06:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-01-18 17:06:26,595 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-01-18 17:06:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:26,596 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-01-18 17:06:26,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-01-18 17:06:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:26,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:26,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:26,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:26,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:26,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-01-18 17:06:26,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:26,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113489054] [2022-01-18 17:06:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:26,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:27,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113489054] [2022-01-18 17:06:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113489054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993291794] [2022-01-18 17:06:27,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:06:27,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:27,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:27,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:06:27,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:06:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:27,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:27,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:06:27,527 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 17:06:27,528 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 22 treesize of output 10 [2022-01-18 17:06:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:27,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:27,839 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:27,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:28,007 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 17 treesize of output 13 [2022-01-18 17:06:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:28,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993291794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:28,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:28,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-01-18 17:06:28,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146966453] [2022-01-18 17:06:28,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:06:28,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:06:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:06:28,050 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:28,829 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-01-18 17:06:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:06:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:28,832 INFO L225 Difference]: With dead ends: 546 [2022-01-18 17:06:28,832 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 17:06:28,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:06:28,834 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:28,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-01-18 17:06:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 17:06:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-01-18 17:06:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-01-18 17:06:28,846 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-01-18 17:06:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:28,846 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-01-18 17:06:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-01-18 17:06:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:28,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:28,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:28,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:29,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:29,073 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-01-18 17:06:29,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:29,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076943322] [2022-01-18 17:06:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:29,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:06:29,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:29,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076943322] [2022-01-18 17:06:29,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076943322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613800928] [2022-01-18 17:06:29,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:06:29,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:29,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:29,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:29,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:06:29,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:06:29,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:29,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:29,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:06:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:29,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:29,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:29,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:30,253 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:30,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:06:30,369 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 17 treesize of output 13 [2022-01-18 17:06:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:30,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613800928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:30,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:30,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 17:06:30,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173267928] [2022-01-18 17:06:30,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:30,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:06:30,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:06:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:06:30,405 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:30,634 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-01-18 17:06:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:06:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:30,638 INFO L225 Difference]: With dead ends: 554 [2022-01-18 17:06:30,638 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 17:06:30,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:06:30,639 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:30,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-01-18 17:06:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 17:06:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-01-18 17:06:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-01-18 17:06:30,649 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-01-18 17:06:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:30,649 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-01-18 17:06:30,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-01-18 17:06:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:30,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:30,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:30,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 17:06:30,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:30,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-01-18 17:06:30,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:30,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689310136] [2022-01-18 17:06:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:30,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:06:31,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689310136] [2022-01-18 17:06:31,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689310136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242929144] [2022-01-18 17:06:31,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:06:31,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:31,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:31,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:31,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:06:31,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:06:31,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:31,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:31,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:06:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:31,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:31,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:31,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:31,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:31,956 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:31,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:06:32,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242929144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:32,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:32,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 17:06:32,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221893114] [2022-01-18 17:06:32,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:32,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:06:32,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:06:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:06:32,110 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:32,327 INFO L93 Difference]: Finished difference Result 639 states and 1386 transitions. [2022-01-18 17:06:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 17:06:32,329 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:32,331 INFO L225 Difference]: With dead ends: 639 [2022-01-18 17:06:32,332 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 17:06:32,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:06:32,333 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:32,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2022-01-18 17:06:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 17:06:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 324. [2022-01-18 17:06:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1393188854489162) internal successors, (691), 323 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 691 transitions. [2022-01-18 17:06:32,343 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 691 transitions. Word has length 32 [2022-01-18 17:06:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:32,343 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 691 transitions. [2022-01-18 17:06:32,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 691 transitions. [2022-01-18 17:06:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:32,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:32,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:32,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 17:06:32,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:32,560 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796233, now seen corresponding path program 7 times [2022-01-18 17:06:32,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989267143] [2022-01-18 17:06:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:32,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:06:32,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:32,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989267143] [2022-01-18 17:06:32,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989267143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843110797] [2022-01-18 17:06:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:06:32,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:32,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:32,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:06:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:33,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:33,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:33,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:33,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:33,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:33,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:33,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:33,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:33,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843110797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:33,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:33,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 17:06:33,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751937457] [2022-01-18 17:06:33,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:06:33,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:06:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:06:33,761 INFO L87 Difference]: Start difference. First operand 324 states and 691 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:34,008 INFO L93 Difference]: Finished difference Result 572 states and 1216 transitions. [2022-01-18 17:06:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:06:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:34,011 INFO L225 Difference]: With dead ends: 572 [2022-01-18 17:06:34,011 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 17:06:34,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:06:34,012 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:34,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-01-18 17:06:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 17:06:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2022-01-18 17:06:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.1581632653061225) internal successors, (846), 392 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 846 transitions. [2022-01-18 17:06:34,027 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 846 transitions. Word has length 32 [2022-01-18 17:06:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:34,027 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 846 transitions. [2022-01-18 17:06:34,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 846 transitions. [2022-01-18 17:06:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:34,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:34,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:34,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:34,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1369686285, now seen corresponding path program 8 times [2022-01-18 17:06:34,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:34,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522340958] [2022-01-18 17:06:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:34,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:06:34,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:34,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522340958] [2022-01-18 17:06:34,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522340958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:34,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493847604] [2022-01-18 17:06:34,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:06:34,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:34,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:34,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:06:34,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:06:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:34,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:34,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:34,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:34,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:35,155 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:35,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:35,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:35,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493847604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:35,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:35,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-01-18 17:06:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870432912] [2022-01-18 17:06:35,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:35,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:35,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:35,274 INFO L87 Difference]: Start difference. First operand 393 states and 846 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:35,747 INFO L93 Difference]: Finished difference Result 743 states and 1622 transitions. [2022-01-18 17:06:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:06:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:35,750 INFO L225 Difference]: With dead ends: 743 [2022-01-18 17:06:35,750 INFO L226 Difference]: Without dead ends: 716 [2022-01-18 17:06:35,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:06:35,752 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:35,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 182 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 453 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-01-18 17:06:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-18 17:06:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 426. [2022-01-18 17:06:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1788235294117646) internal successors, (926), 425 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 926 transitions. [2022-01-18 17:06:35,766 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 926 transitions. Word has length 32 [2022-01-18 17:06:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:35,766 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 926 transitions. [2022-01-18 17:06:35,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 926 transitions. [2022-01-18 17:06:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:35,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:35,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:35,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:35,982 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,SelfDestructingSolverStorable9 [2022-01-18 17:06:35,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 9 times [2022-01-18 17:06:35,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:35,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619169385] [2022-01-18 17:06:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:35,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:36,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619169385] [2022-01-18 17:06:36,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619169385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386578805] [2022-01-18 17:06:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:06:36,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:36,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:06:36,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:06:36,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:36,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:36,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-01-18 17:06:36,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:36,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:36,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 26 [2022-01-18 17:06:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:36,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:38,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:38,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-01-18 17:06:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386578805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:38,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-01-18 17:06:38,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252653543] [2022-01-18 17:06:38,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:38,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:06:38,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:06:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:06:38,397 INFO L87 Difference]: Start difference. First operand 426 states and 926 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-01-18 17:06:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:40,825 INFO L93 Difference]: Finished difference Result 1367 states and 2897 transitions. [2022-01-18 17:06:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 17:06:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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 32 [2022-01-18 17:06:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:40,831 INFO L225 Difference]: With dead ends: 1367 [2022-01-18 17:06:40,831 INFO L226 Difference]: Without dead ends: 1312 [2022-01-18 17:06:40,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1210, Invalid=6800, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:06:40,834 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 396 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 903 Invalid, 0 Unknown, 749 Unchecked, 0.5s Time] [2022-01-18 17:06:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-18 17:06:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 562. [2022-01-18 17:06:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.229946524064171) internal successors, (1251), 561 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1251 transitions. [2022-01-18 17:06:40,853 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1251 transitions. Word has length 32 [2022-01-18 17:06:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:40,853 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1251 transitions. [2022-01-18 17:06:40,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-01-18 17:06:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1251 transitions. [2022-01-18 17:06:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:40,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:40,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:40,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:41,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:41,077 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 10 times [2022-01-18 17:06:41,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461193386] [2022-01-18 17:06:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:41,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:41,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461193386] [2022-01-18 17:06:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461193386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886360110] [2022-01-18 17:06:41,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:06:41,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:41,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:41,320 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:41,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:06:41,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:06:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:41,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:41,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:41,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:41,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:41,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:41,956 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:41,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:42,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886360110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:42,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:42,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:06:42,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370343839] [2022-01-18 17:06:42,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:42,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:42,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:42,101 INFO L87 Difference]: Start difference. First operand 562 states and 1251 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:42,351 INFO L93 Difference]: Finished difference Result 669 states and 1470 transitions. [2022-01-18 17:06:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:06:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:42,354 INFO L225 Difference]: With dead ends: 669 [2022-01-18 17:06:42,354 INFO L226 Difference]: Without dead ends: 652 [2022-01-18 17:06:42,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:06:42,356 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:42,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-01-18 17:06:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-18 17:06:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 584. [2022-01-18 17:06:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2315608919382504) internal successors, (1301), 583 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1301 transitions. [2022-01-18 17:06:42,384 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1301 transitions. Word has length 32 [2022-01-18 17:06:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1301 transitions. [2022-01-18 17:06:42,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1301 transitions. [2022-01-18 17:06:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:42,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:42,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:42,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:42,611 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,SelfDestructingSolverStorable11 [2022-01-18 17:06:42,612 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash 112614937, now seen corresponding path program 11 times [2022-01-18 17:06:42,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830103645] [2022-01-18 17:06:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:42,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:42,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830103645] [2022-01-18 17:06:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830103645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729929306] [2022-01-18 17:06:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:06:42,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:42,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:42,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:06:42,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:06:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:43,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:43,123 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 24 treesize of output 24 [2022-01-18 17:06:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:43,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:43,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:43,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:43,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:43,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:43,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:43,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 17:06:43,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:43,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729929306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:43,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:43,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2022-01-18 17:06:43,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440298409] [2022-01-18 17:06:43,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:43,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:06:43,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:06:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:06:43,794 INFO L87 Difference]: Start difference. First operand 584 states and 1301 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:44,225 INFO L93 Difference]: Finished difference Result 969 states and 2149 transitions. [2022-01-18 17:06:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:06:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:44,229 INFO L225 Difference]: With dead ends: 969 [2022-01-18 17:06:44,229 INFO L226 Difference]: Without dead ends: 944 [2022-01-18 17:06:44,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:06:44,230 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:44,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 322 Unchecked, 0.1s Time] [2022-01-18 17:06:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-18 17:06:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 655. [2022-01-18 17:06:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.2370030581039755) internal successors, (1463), 654 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1463 transitions. [2022-01-18 17:06:44,246 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1463 transitions. Word has length 32 [2022-01-18 17:06:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1463 transitions. [2022-01-18 17:06:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1463 transitions. [2022-01-18 17:06:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:44,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:44,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:44,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:44,470 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,SelfDestructingSolverStorable12 [2022-01-18 17:06:44,470 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash -708561801, now seen corresponding path program 12 times [2022-01-18 17:06:44,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323403785] [2022-01-18 17:06:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:44,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:44,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323403785] [2022-01-18 17:06:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323403785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271050338] [2022-01-18 17:06:44,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:06:44,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:44,702 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:06:44,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:06:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:44,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:44,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:44,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:06:45,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:45,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:45,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:45,342 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:45,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:06:45,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:45,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271050338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:45,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:45,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:06:45,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559589423] [2022-01-18 17:06:45,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:45,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:45,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:45,492 INFO L87 Difference]: Start difference. First operand 655 states and 1463 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:45,713 INFO L93 Difference]: Finished difference Result 715 states and 1583 transitions. [2022-01-18 17:06:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:06:45,713 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:45,716 INFO L225 Difference]: With dead ends: 715 [2022-01-18 17:06:45,716 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 17:06:45,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:06:45,717 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:45,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-01-18 17:06:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 17:06:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2022-01-18 17:06:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.2305433186490453) internal successors, (1519), 681 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1519 transitions. [2022-01-18 17:06:45,729 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1519 transitions. Word has length 32 [2022-01-18 17:06:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1519 transitions. [2022-01-18 17:06:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1519 transitions. [2022-01-18 17:06:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:45,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:45,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:45,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:45,943 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,SelfDestructingSolverStorable13 [2022-01-18 17:06:45,943 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash 306961723, now seen corresponding path program 13 times [2022-01-18 17:06:45,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:45,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810430824] [2022-01-18 17:06:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:45,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:46,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:46,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810430824] [2022-01-18 17:06:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810430824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:46,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185253419] [2022-01-18 17:06:46,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:06:46,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:46,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:06:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:46,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:46,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:46,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:46,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:46,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:46,902 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:46,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:46,991 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 17 treesize of output 13 [2022-01-18 17:06:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:47,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185253419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:47,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:47,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-01-18 17:06:47,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850937534] [2022-01-18 17:06:47,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:47,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:06:47,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:06:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:06:47,029 INFO L87 Difference]: Start difference. First operand 682 states and 1519 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:47,701 INFO L93 Difference]: Finished difference Result 1476 states and 3239 transitions. [2022-01-18 17:06:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:06:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:47,706 INFO L225 Difference]: With dead ends: 1476 [2022-01-18 17:06:47,706 INFO L226 Difference]: Without dead ends: 1322 [2022-01-18 17:06:47,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:06:47,708 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 252 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:47,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 349 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 530 Invalid, 0 Unknown, 467 Unchecked, 0.2s Time] [2022-01-18 17:06:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-01-18 17:06:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 843. [2022-01-18 17:06:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.2422802850356294) internal successors, (1888), 842 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1888 transitions. [2022-01-18 17:06:47,728 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1888 transitions. Word has length 32 [2022-01-18 17:06:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:47,728 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1888 transitions. [2022-01-18 17:06:47,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1888 transitions. [2022-01-18 17:06:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:47,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:47,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:47,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:47,952 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,SelfDestructingSolverStorable14 [2022-01-18 17:06:47,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1366997859, now seen corresponding path program 14 times [2022-01-18 17:06:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821422749] [2022-01-18 17:06:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:47,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:48,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821422749] [2022-01-18 17:06:48,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821422749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057225307] [2022-01-18 17:06:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:06:48,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:48,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:48,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:06:48,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:06:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:48,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:48,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:48,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:48,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:48,944 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:48,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:49,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057225307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:49,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:49,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-01-18 17:06:49,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606143588] [2022-01-18 17:06:49,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:49,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:06:49,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:06:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:06:49,055 INFO L87 Difference]: Start difference. First operand 843 states and 1888 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:49,716 INFO L93 Difference]: Finished difference Result 1446 states and 3193 transitions. [2022-01-18 17:06:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:06:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:49,721 INFO L225 Difference]: With dead ends: 1446 [2022-01-18 17:06:49,722 INFO L226 Difference]: Without dead ends: 1352 [2022-01-18 17:06:49,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:06:49,723 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:49,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 247 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 409 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-01-18 17:06:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-18 17:06:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1008. [2022-01-18 17:06:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.266137040714995) internal successors, (2282), 1007 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2282 transitions. [2022-01-18 17:06:49,743 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2282 transitions. Word has length 32 [2022-01-18 17:06:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2282 transitions. [2022-01-18 17:06:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2282 transitions. [2022-01-18 17:06:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:49,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:49,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:49,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:49,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:49,965 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2106792699, now seen corresponding path program 15 times [2022-01-18 17:06:49,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:49,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791669161] [2022-01-18 17:06:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:49,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:50,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791669161] [2022-01-18 17:06:50,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791669161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305032370] [2022-01-18 17:06:50,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:06:50,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:50,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:50,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:06:50,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:06:50,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:50,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:06:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:50,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:50,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:06:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:50,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:50,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-01-18 17:06:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:50,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:51,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:51,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:51,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:51,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 17:06:51,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 17:06:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:51,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305032370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:51,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:51,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-01-18 17:06:51,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174356704] [2022-01-18 17:06:51,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:51,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 17:06:51,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 17:06:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:06:51,629 INFO L87 Difference]: Start difference. First operand 1008 states and 2282 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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) [2022-01-18 17:06:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:52,336 INFO L93 Difference]: Finished difference Result 1235 states and 2744 transitions. [2022-01-18 17:06:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:06:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 32 [2022-01-18 17:06:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:52,342 INFO L225 Difference]: With dead ends: 1235 [2022-01-18 17:06:52,342 INFO L226 Difference]: Without dead ends: 1214 [2022-01-18 17:06:52,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:06:52,344 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:52,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 215 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 311 Unchecked, 0.0s Time] [2022-01-18 17:06:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-18 17:06:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1080. [2022-01-18 17:06:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.2567191844300276) internal successors, (2435), 1079 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2435 transitions. [2022-01-18 17:06:52,372 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2435 transitions. Word has length 32 [2022-01-18 17:06:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 2435 transitions. [2022-01-18 17:06:52,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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) [2022-01-18 17:06:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2435 transitions. [2022-01-18 17:06:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:52,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:52,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:52,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:52,591 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,SelfDestructingSolverStorable16 [2022-01-18 17:06:52,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 78448107, now seen corresponding path program 16 times [2022-01-18 17:06:52,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850793122] [2022-01-18 17:06:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:52,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:52,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:52,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850793122] [2022-01-18 17:06:52,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850793122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292922175] [2022-01-18 17:06:52,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:06:52,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:52,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:52,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:06:52,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:06:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:52,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:53,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:53,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:06:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:53,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:53,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:53,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:53,422 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:53,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:53,546 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 17 treesize of output 13 [2022-01-18 17:06:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:53,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292922175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:53,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:53,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 17:06:53,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026380633] [2022-01-18 17:06:53,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:53,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:06:53,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:06:53,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:06:53,580 INFO L87 Difference]: Start difference. First operand 1080 states and 2435 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:53,805 INFO L93 Difference]: Finished difference Result 1216 states and 2718 transitions. [2022-01-18 17:06:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:06:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:53,810 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 17:06:53,811 INFO L226 Difference]: Without dead ends: 1204 [2022-01-18 17:06:53,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:06:53,812 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:53,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 125 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-01-18 17:06:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-01-18 17:06:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1083. [2022-01-18 17:06:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.253234750462107) internal successors, (2438), 1082 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2438 transitions. [2022-01-18 17:06:53,832 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2438 transitions. Word has length 32 [2022-01-18 17:06:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:53,832 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2438 transitions. [2022-01-18 17:06:53,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2438 transitions. [2022-01-18 17:06:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:53,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:53,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:53,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:06:54,047 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1563537433, now seen corresponding path program 17 times [2022-01-18 17:06:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587838023] [2022-01-18 17:06:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:54,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587838023] [2022-01-18 17:06:54,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587838023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234362909] [2022-01-18 17:06:54,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:06:54,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:54,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:54,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:06:54,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:06:54,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:54,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:54,521 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 24 treesize of output 24 [2022-01-18 17:06:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:54,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:54,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:54,903 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:54,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:06:55,051 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 17 treesize of output 13 [2022-01-18 17:06:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234362909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:55,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:55,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 17:06:55,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089082397] [2022-01-18 17:06:55,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:55,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:06:55,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:06:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:06:55,086 INFO L87 Difference]: Start difference. First operand 1083 states and 2438 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:55,282 INFO L93 Difference]: Finished difference Result 1155 states and 2591 transitions. [2022-01-18 17:06:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:06:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:55,285 INFO L225 Difference]: With dead ends: 1155 [2022-01-18 17:06:55,285 INFO L226 Difference]: Without dead ends: 1141 [2022-01-18 17:06:55,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:06:55,286 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:55,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-01-18 17:06:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-18 17:06:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1086. [2022-01-18 17:06:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.249769585253456) internal successors, (2441), 1085 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2441 transitions. [2022-01-18 17:06:55,304 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2441 transitions. Word has length 32 [2022-01-18 17:06:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:55,304 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2441 transitions. [2022-01-18 17:06:55,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2441 transitions. [2022-01-18 17:06:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:55,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:55,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:55,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:55,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:55,519 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 18 times [2022-01-18 17:06:55,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14021957] [2022-01-18 17:06:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:55,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:55,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14021957] [2022-01-18 17:06:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14021957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636111678] [2022-01-18 17:06:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:06:55,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:55,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:55,717 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:55,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:06:55,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:06:55,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:06:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:55,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:55,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:06:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:56,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:56,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:06:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:56,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:56,412 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:56,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:06:56,507 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 17 treesize of output 13 [2022-01-18 17:06:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636111678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:56,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:06:56,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465333468] [2022-01-18 17:06:56,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:56,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:56,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:56,542 INFO L87 Difference]: Start difference. First operand 1086 states and 2441 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:56,827 INFO L93 Difference]: Finished difference Result 1287 states and 2865 transitions. [2022-01-18 17:06:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:06:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:56,830 INFO L225 Difference]: With dead ends: 1287 [2022-01-18 17:06:56,830 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:06:56,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:06:56,831 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:56,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-01-18 17:06:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:06:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1147. [2022-01-18 17:06:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.244328097731239) internal successors, (2572), 1146 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2572 transitions. [2022-01-18 17:06:56,852 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2572 transitions. Word has length 32 [2022-01-18 17:06:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 2572 transitions. [2022-01-18 17:06:56,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2572 transitions. [2022-01-18 17:06:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:56,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:56,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:56,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:57,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:57,067 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1976105177, now seen corresponding path program 19 times [2022-01-18 17:06:57,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:57,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299173939] [2022-01-18 17:06:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:57,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:57,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299173939] [2022-01-18 17:06:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299173939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320254940] [2022-01-18 17:06:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:06:57,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:57,278 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:57,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 17:06:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:57,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:57,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 17:06:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:57,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:57,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:57,940 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:57,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:58,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320254940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:58,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:58,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:06:58,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543004606] [2022-01-18 17:06:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:58,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:58,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:58,063 INFO L87 Difference]: Start difference. First operand 1147 states and 2572 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:58,309 INFO L93 Difference]: Finished difference Result 1262 states and 2801 transitions. [2022-01-18 17:06:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:06:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:58,313 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 17:06:58,313 INFO L226 Difference]: Without dead ends: 1236 [2022-01-18 17:06:58,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:06:58,314 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:58,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-01-18 17:06:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-01-18 17:06:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1157. [2022-01-18 17:06:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2422145328719725) internal successors, (2592), 1156 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2592 transitions. [2022-01-18 17:06:58,333 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2592 transitions. Word has length 32 [2022-01-18 17:06:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:58,333 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2592 transitions. [2022-01-18 17:06:58,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2592 transitions. [2022-01-18 17:06:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:58,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:58,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:58,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 17:06:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:58,551 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:06:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:06:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -516998149, now seen corresponding path program 20 times [2022-01-18 17:06:58,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:06:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643510696] [2022-01-18 17:06:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:06:58,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:06:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:06:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:58,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:06:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643510696] [2022-01-18 17:06:58,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643510696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:06:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129660442] [2022-01-18 17:06:58,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:06:58,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:06:58,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:06:58,777 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:06:58,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 17:06:58,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:06:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:06:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:06:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:06:58,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:06:58,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 17:06:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:06:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:06:59,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:06:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:06:59,391 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:06:59,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:06:59,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:06:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:06:59,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129660442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:06:59,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:06:59,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:06:59,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490503233] [2022-01-18 17:06:59,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:06:59,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:06:59,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:06:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:06:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:06:59,527 INFO L87 Difference]: Start difference. First operand 1157 states and 2592 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:06:59,787 INFO L93 Difference]: Finished difference Result 1281 states and 2850 transitions. [2022-01-18 17:06:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:06:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:06:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:06:59,791 INFO L225 Difference]: With dead ends: 1281 [2022-01-18 17:06:59,791 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 17:06:59,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:06:59,792 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:06:59,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 307 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-01-18 17:06:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 17:06:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1165. [2022-01-18 17:06:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.2448453608247423) internal successors, (2613), 1164 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2613 transitions. [2022-01-18 17:06:59,811 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2613 transitions. Word has length 32 [2022-01-18 17:06:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:06:59,811 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2613 transitions. [2022-01-18 17:06:59,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:06:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2613 transitions. [2022-01-18 17:06:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:06:59,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:06:59,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:06:59,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:00,036 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,SelfDestructingSolverStorable21 [2022-01-18 17:07:00,036 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 495694383, now seen corresponding path program 21 times [2022-01-18 17:07:00,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445773246] [2022-01-18 17:07:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:00,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:00,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445773246] [2022-01-18 17:07:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445773246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512039103] [2022-01-18 17:07:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:00,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:00,240 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:00,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 17:07:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:00,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:00,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:00,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:00,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:00,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:00,840 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:00,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:00,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:00,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512039103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:00,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:00,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 17:07:00,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443581904] [2022-01-18 17:07:00,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:00,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:00,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:00,963 INFO L87 Difference]: Start difference. First operand 1165 states and 2613 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:01,215 INFO L93 Difference]: Finished difference Result 1292 states and 2864 transitions. [2022-01-18 17:07:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:07:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:01,219 INFO L225 Difference]: With dead ends: 1292 [2022-01-18 17:07:01,219 INFO L226 Difference]: Without dead ends: 1268 [2022-01-18 17:07:01,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:07:01,220 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:01,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-01-18 17:07:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-01-18 17:07:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1176. [2022-01-18 17:07:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.244255319148936) internal successors, (2637), 1175 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2637 transitions. [2022-01-18 17:07:01,239 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2637 transitions. Word has length 32 [2022-01-18 17:07:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:01,240 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2637 transitions. [2022-01-18 17:07:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2637 transitions. [2022-01-18 17:07:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:01,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:01,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:01,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:01,451 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,SelfDestructingSolverStorable22 [2022-01-18 17:07:01,452 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash -956375147, now seen corresponding path program 22 times [2022-01-18 17:07:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344519837] [2022-01-18 17:07:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:01,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:01,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344519837] [2022-01-18 17:07:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344519837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:01,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828425151] [2022-01-18 17:07:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:07:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:01,689 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 17:07:01,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:07:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:01,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:01,936 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 31 treesize of output 29 [2022-01-18 17:07:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:02,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:02,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:02,347 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:02,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:02,458 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 17 treesize of output 13 [2022-01-18 17:07:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:02,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828425151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:02,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:02,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 31 [2022-01-18 17:07:02,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432903482] [2022-01-18 17:07:02,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:07:02,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:07:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:07:02,494 INFO L87 Difference]: Start difference. First operand 1176 states and 2637 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:02,830 INFO L93 Difference]: Finished difference Result 1465 states and 3217 transitions. [2022-01-18 17:07:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:07:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:02,834 INFO L225 Difference]: With dead ends: 1465 [2022-01-18 17:07:02,834 INFO L226 Difference]: Without dead ends: 1415 [2022-01-18 17:07:02,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:07:02,836 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:02,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-01-18 17:07:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-18 17:07:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1212. [2022-01-18 17:07:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.255986787778695) internal successors, (2732), 1211 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2732 transitions. [2022-01-18 17:07:02,857 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2732 transitions. Word has length 32 [2022-01-18 17:07:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:02,857 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2732 transitions. [2022-01-18 17:07:02,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2732 transitions. [2022-01-18 17:07:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:02,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:02,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:02,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 17:07:03,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:03,081 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1996610945, now seen corresponding path program 23 times [2022-01-18 17:07:03,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:03,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551613862] [2022-01-18 17:07:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:03,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:03,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551613862] [2022-01-18 17:07:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551613862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493388744] [2022-01-18 17:07:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:07:03,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:03,286 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:03,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 17:07:03,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:07:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:03,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:03,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:03,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:03,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:03,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:03,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:03,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:03,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 17:07:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493388744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:04,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:04,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 36 [2022-01-18 17:07:04,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485812494] [2022-01-18 17:07:04,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:07:04,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:07:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:07:04,176 INFO L87 Difference]: Start difference. First operand 1212 states and 2732 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:05,834 INFO L93 Difference]: Finished difference Result 2662 states and 5786 transitions. [2022-01-18 17:07:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:07:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:05,841 INFO L225 Difference]: With dead ends: 2662 [2022-01-18 17:07:05,841 INFO L226 Difference]: Without dead ends: 2469 [2022-01-18 17:07:05,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1014, Invalid=5628, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:07:05,842 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:05,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 379 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 922 Invalid, 0 Unknown, 416 Unchecked, 0.4s Time] [2022-01-18 17:07:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-01-18 17:07:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1440. [2022-01-18 17:07:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.244614315496873) internal successors, (3230), 1439 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3230 transitions. [2022-01-18 17:07:05,878 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3230 transitions. Word has length 32 [2022-01-18 17:07:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3230 transitions. [2022-01-18 17:07:05,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3230 transitions. [2022-01-18 17:07:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:05,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:05,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:05,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 17:07:06,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:06,105 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1401532203, now seen corresponding path program 24 times [2022-01-18 17:07:06,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:06,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425941768] [2022-01-18 17:07:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:06,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:06,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425941768] [2022-01-18 17:07:06,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425941768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64099420] [2022-01-18 17:07:06,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:07:06,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:06,314 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:06,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 17:07:06,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:07:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:06,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:06,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:06,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:06,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:06,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:06,944 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:06,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:07,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64099420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:07,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 17:07:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910399454] [2022-01-18 17:07:07,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:07,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:07,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:07,089 INFO L87 Difference]: Start difference. First operand 1440 states and 3230 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:07,367 INFO L93 Difference]: Finished difference Result 1680 states and 3724 transitions. [2022-01-18 17:07:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:07:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:07,371 INFO L225 Difference]: With dead ends: 1680 [2022-01-18 17:07:07,371 INFO L226 Difference]: Without dead ends: 1666 [2022-01-18 17:07:07,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:07:07,372 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:07,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-01-18 17:07:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-01-18 17:07:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1487. [2022-01-18 17:07:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.2476446837146704) internal successors, (3340), 1486 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3340 transitions. [2022-01-18 17:07:07,393 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3340 transitions. Word has length 32 [2022-01-18 17:07:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:07,393 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 3340 transitions. [2022-01-18 17:07:07,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3340 transitions. [2022-01-18 17:07:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:07,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:07,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:07,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 17:07:07,611 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,SelfDestructingSolverStorable25 [2022-01-18 17:07:07,611 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 809339119, now seen corresponding path program 25 times [2022-01-18 17:07:07,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402544742] [2022-01-18 17:07:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:07,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:07,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402544742] [2022-01-18 17:07:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402544742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250637333] [2022-01-18 17:07:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:07:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:07,828 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:07,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 17:07:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:07,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:08,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:08,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 17:07:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:08,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:08,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:08,452 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:08,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:08,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250637333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:08,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:08,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 17:07:08,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372414005] [2022-01-18 17:07:08,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:08,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:08,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:08,558 INFO L87 Difference]: Start difference. First operand 1487 states and 3340 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:08,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:08,851 INFO L93 Difference]: Finished difference Result 1626 states and 3621 transitions. [2022-01-18 17:07:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:07:08,852 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:08,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:08,855 INFO L225 Difference]: With dead ends: 1626 [2022-01-18 17:07:08,855 INFO L226 Difference]: Without dead ends: 1610 [2022-01-18 17:07:08,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:07:08,855 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:08,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-01-18 17:07:08,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-01-18 17:07:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1486. [2022-01-18 17:07:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.2471380471380473) internal successors, (3337), 1485 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3337 transitions. [2022-01-18 17:07:08,878 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3337 transitions. Word has length 32 [2022-01-18 17:07:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:08,878 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 3337 transitions. [2022-01-18 17:07:08,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3337 transitions. [2022-01-18 17:07:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:08,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:08,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:08,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:09,103 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,SelfDestructingSolverStorable26 [2022-01-18 17:07:09,103 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1602633313, now seen corresponding path program 26 times [2022-01-18 17:07:09,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:09,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675028764] [2022-01-18 17:07:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:09,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:09,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675028764] [2022-01-18 17:07:09,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675028764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547366056] [2022-01-18 17:07:09,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:07:09,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:09,348 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:09,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 17:07:09,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:07:09,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:09,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:09,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:09,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:09,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:10,040 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:10,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:10,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:10,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547366056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:10,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:10,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 17:07:10,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042820622] [2022-01-18 17:07:10,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:10,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:10,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:10,144 INFO L87 Difference]: Start difference. First operand 1486 states and 3337 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:10,379 INFO L93 Difference]: Finished difference Result 1659 states and 3686 transitions. [2022-01-18 17:07:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:07:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:10,382 INFO L225 Difference]: With dead ends: 1659 [2022-01-18 17:07:10,382 INFO L226 Difference]: Without dead ends: 1645 [2022-01-18 17:07:10,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:07:10,382 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:10,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-01-18 17:07:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-18 17:07:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1494. [2022-01-18 17:07:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.245813797722706) internal successors, (3353), 1493 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3353 transitions. [2022-01-18 17:07:10,404 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3353 transitions. Word has length 32 [2022-01-18 17:07:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:10,404 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 3353 transitions. [2022-01-18 17:07:10,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3353 transitions. [2022-01-18 17:07:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:10,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:10,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:10,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:10,630 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,SelfDestructingSolverStorable27 [2022-01-18 17:07:10,630 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash -117543987, now seen corresponding path program 27 times [2022-01-18 17:07:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:10,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382553538] [2022-01-18 17:07:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:10,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382553538] [2022-01-18 17:07:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382553538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974055631] [2022-01-18 17:07:10,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:10,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:10,838 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:10,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 17:07:10,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:10,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:11,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:11,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:07:11,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:11,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-01-18 17:07:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:11,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:12,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:12,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:12,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-01-18 17:07:12,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:12,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974055631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:12,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:12,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-01-18 17:07:12,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920011598] [2022-01-18 17:07:12,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:12,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:07:12,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:07:12,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:07:12,593 INFO L87 Difference]: Start difference. First operand 1494 states and 3353 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:13,000 INFO L93 Difference]: Finished difference Result 1596 states and 3554 transitions. [2022-01-18 17:07:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:07:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:13,003 INFO L225 Difference]: With dead ends: 1596 [2022-01-18 17:07:13,003 INFO L226 Difference]: Without dead ends: 1563 [2022-01-18 17:07:13,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:07:13,004 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:13,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 433 Unchecked, 0.1s Time] [2022-01-18 17:07:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-01-18 17:07:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1505. [2022-01-18 17:07:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.2513297872340425) internal successors, (3386), 1504 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3386 transitions. [2022-01-18 17:07:13,024 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3386 transitions. Word has length 32 [2022-01-18 17:07:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:13,024 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3386 transitions. [2022-01-18 17:07:13,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3386 transitions. [2022-01-18 17:07:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:13,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:13,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:13,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 17:07:13,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:07:13,242 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 28 times [2022-01-18 17:07:13,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62413096] [2022-01-18 17:07:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:13,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:07:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62413096] [2022-01-18 17:07:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62413096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765619583] [2022-01-18 17:07:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:07:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:13,430 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:13,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 17:07:13,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:07:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:13,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:13,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:13,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:13,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:13,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:14,136 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:14,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:14,291 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 17 treesize of output 13 [2022-01-18 17:07:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765619583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:14,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:14,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-18 17:07:14,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647334724] [2022-01-18 17:07:14,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:14,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:14,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:14,337 INFO L87 Difference]: Start difference. First operand 1505 states and 3386 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:14,600 INFO L93 Difference]: Finished difference Result 1850 states and 4103 transitions. [2022-01-18 17:07:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:07:14,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:14,603 INFO L225 Difference]: With dead ends: 1850 [2022-01-18 17:07:14,603 INFO L226 Difference]: Without dead ends: 1756 [2022-01-18 17:07:14,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:07:14,604 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:14,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 234 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-01-18 17:07:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-01-18 17:07:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1578. [2022-01-18 17:07:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.25428027901078) internal successors, (3555), 1577 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3555 transitions. [2022-01-18 17:07:14,628 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3555 transitions. Word has length 32 [2022-01-18 17:07:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:14,628 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3555 transitions. [2022-01-18 17:07:14,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3555 transitions. [2022-01-18 17:07:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:14,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:14,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:14,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:14,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:14,852 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 968255547, now seen corresponding path program 29 times [2022-01-18 17:07:14,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:14,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204703647] [2022-01-18 17:07:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:14,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:07:15,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204703647] [2022-01-18 17:07:15,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204703647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782904862] [2022-01-18 17:07:15,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:07:15,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:15,035 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:15,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 17:07:15,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:07:15,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:15,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:15,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:07:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:15,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:15,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:15,633 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:15,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:15,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782904862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:15,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:15,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-18 17:07:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864174000] [2022-01-18 17:07:15,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:15,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:15,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:15,767 INFO L87 Difference]: Start difference. First operand 1578 states and 3555 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:16,028 INFO L93 Difference]: Finished difference Result 2252 states and 4991 transitions. [2022-01-18 17:07:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:07:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:16,033 INFO L225 Difference]: With dead ends: 2252 [2022-01-18 17:07:16,033 INFO L226 Difference]: Without dead ends: 2140 [2022-01-18 17:07:16,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:07:16,034 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:16,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 240 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-01-18 17:07:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-01-18 17:07:16,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1707. [2022-01-18 17:07:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 2.2626025791324738) internal successors, (3860), 1706 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 3860 transitions. [2022-01-18 17:07:16,064 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 3860 transitions. Word has length 32 [2022-01-18 17:07:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:16,064 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 3860 transitions. [2022-01-18 17:07:16,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 3860 transitions. [2022-01-18 17:07:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:16,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:16,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:16,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:16,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:16,288 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1980948079, now seen corresponding path program 30 times [2022-01-18 17:07:16,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121279124] [2022-01-18 17:07:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:16,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:07:16,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121279124] [2022-01-18 17:07:16,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121279124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557072290] [2022-01-18 17:07:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:07:16,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:16,496 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 17:07:16,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:07:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:16,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:16,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:07:16,878 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 17:07:16,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:16,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:17,244 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:17,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:17,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557072290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:17,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:17,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-01-18 17:07:17,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802548102] [2022-01-18 17:07:17,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:17,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:07:17,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:07:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:07:17,412 INFO L87 Difference]: Start difference. First operand 1707 states and 3860 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 17:07:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:18,027 INFO L93 Difference]: Finished difference Result 2522 states and 5549 transitions. [2022-01-18 17:07:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:07:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:18,032 INFO L225 Difference]: With dead ends: 2522 [2022-01-18 17:07:18,032 INFO L226 Difference]: Without dead ends: 2400 [2022-01-18 17:07:18,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:07:18,033 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 248 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:18,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 203 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 471 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-01-18 17:07:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-01-18 17:07:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1538. [2022-01-18 17:07:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.2485361093038385) internal successors, (3456), 1537 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3456 transitions. [2022-01-18 17:07:18,062 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3456 transitions. Word has length 32 [2022-01-18 17:07:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:18,062 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 3456 transitions. [2022-01-18 17:07:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 17:07:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3456 transitions. [2022-01-18 17:07:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:18,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:18,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:18,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:18,279 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,SelfDestructingSolverStorable31 [2022-01-18 17:07:18,279 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 31 times [2022-01-18 17:07:18,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868561216] [2022-01-18 17:07:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:18,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:18,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868561216] [2022-01-18 17:07:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868561216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421519584] [2022-01-18 17:07:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:07:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:18,461 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:18,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 17:07:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:18,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:18,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:18,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:18,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:18,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:18,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:19,121 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:19,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:19,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:19,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421519584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:19,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:19,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:19,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446068224] [2022-01-18 17:07:19,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:19,330 INFO L87 Difference]: Start difference. First operand 1538 states and 3456 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:20,243 INFO L93 Difference]: Finished difference Result 2813 states and 6181 transitions. [2022-01-18 17:07:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:07:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:20,258 INFO L225 Difference]: With dead ends: 2813 [2022-01-18 17:07:20,258 INFO L226 Difference]: Without dead ends: 2550 [2022-01-18 17:07:20,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:07:20,258 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 288 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:20,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 439 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 629 Invalid, 0 Unknown, 1159 Unchecked, 0.2s Time] [2022-01-18 17:07:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-01-18 17:07:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1860. [2022-01-18 17:07:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 2.2501344809037116) internal successors, (4183), 1859 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 4183 transitions. [2022-01-18 17:07:20,280 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 4183 transitions. Word has length 32 [2022-01-18 17:07:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 4183 transitions. [2022-01-18 17:07:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 4183 transitions. [2022-01-18 17:07:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:20,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:20,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:20,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:20,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:20,483 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash 282445069, now seen corresponding path program 32 times [2022-01-18 17:07:20,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:20,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223482221] [2022-01-18 17:07:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:20,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:20,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223482221] [2022-01-18 17:07:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223482221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515279456] [2022-01-18 17:07:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:07:20,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:20,678 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:20,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 17:07:20,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:07:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:20,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:20,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:21,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:21,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:21,340 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:21,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:21,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515279456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:21,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:21,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:21,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023231316] [2022-01-18 17:07:21,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:21,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:21,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:21,535 INFO L87 Difference]: Start difference. First operand 1860 states and 4183 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:22,008 INFO L93 Difference]: Finished difference Result 2130 states and 4721 transitions. [2022-01-18 17:07:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:07:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:22,010 INFO L225 Difference]: With dead ends: 2130 [2022-01-18 17:07:22,010 INFO L226 Difference]: Without dead ends: 2102 [2022-01-18 17:07:22,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:07:22,011 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:22,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2022-01-18 17:07:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-01-18 17:07:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1894. [2022-01-18 17:07:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.2519809825673534) internal successors, (4263), 1893 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 4263 transitions. [2022-01-18 17:07:22,032 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 4263 transitions. Word has length 32 [2022-01-18 17:07:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:22,032 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 4263 transitions. [2022-01-18 17:07:22,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 4263 transitions. [2022-01-18 17:07:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:22,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:22,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:22,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 17:07:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:22,235 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash 458576657, now seen corresponding path program 33 times [2022-01-18 17:07:22,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882097844] [2022-01-18 17:07:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:22,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:22,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882097844] [2022-01-18 17:07:22,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882097844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:22,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77754956] [2022-01-18 17:07:22,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:22,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:22,454 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:22,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 17:07:22,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:22,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:22,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:22,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:22,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:22,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:22,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:23,109 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:23,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:23,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77754956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:23,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:23,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:23,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437580629] [2022-01-18 17:07:23,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:23,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:23,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:23,263 INFO L87 Difference]: Start difference. First operand 1894 states and 4263 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:23,959 INFO L93 Difference]: Finished difference Result 2381 states and 5316 transitions. [2022-01-18 17:07:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:07:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:23,963 INFO L225 Difference]: With dead ends: 2381 [2022-01-18 17:07:23,963 INFO L226 Difference]: Without dead ends: 2304 [2022-01-18 17:07:23,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:07:23,963 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:23,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 268 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 409 Invalid, 0 Unknown, 444 Unchecked, 0.2s Time] [2022-01-18 17:07:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-01-18 17:07:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2022. [2022-01-18 17:07:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.256308758040574) internal successors, (4560), 2021 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4560 transitions. [2022-01-18 17:07:23,987 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4560 transitions. Word has length 32 [2022-01-18 17:07:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4560 transitions. [2022-01-18 17:07:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4560 transitions. [2022-01-18 17:07:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:23,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:23,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:24,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:24,207 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,SelfDestructingSolverStorable34 [2022-01-18 17:07:24,208 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -362600081, now seen corresponding path program 34 times [2022-01-18 17:07:24,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143339154] [2022-01-18 17:07:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:24,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:24,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143339154] [2022-01-18 17:07:24,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143339154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397097964] [2022-01-18 17:07:24,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:07:24,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:24,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:24,419 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:24,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 17:07:24,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:07:24,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:24,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:24,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:24,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:24,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:24,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:25,064 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:25,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:25,170 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 17 treesize of output 13 [2022-01-18 17:07:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397097964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:25,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:25,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:25,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850463820] [2022-01-18 17:07:25,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:25,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:25,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:25,205 INFO L87 Difference]: Start difference. First operand 2022 states and 4560 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:25,592 INFO L93 Difference]: Finished difference Result 2174 states and 4888 transitions. [2022-01-18 17:07:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:07:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:25,594 INFO L225 Difference]: With dead ends: 2174 [2022-01-18 17:07:25,594 INFO L226 Difference]: Without dead ends: 2154 [2022-01-18 17:07:25,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:07:25,595 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:25,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 326 Unchecked, 0.1s Time] [2022-01-18 17:07:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-01-18 17:07:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2043. [2022-01-18 17:07:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.254162585700294) internal successors, (4603), 2042 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 4603 transitions. [2022-01-18 17:07:25,633 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 4603 transitions. Word has length 32 [2022-01-18 17:07:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 4603 transitions. [2022-01-18 17:07:25,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 4603 transitions. [2022-01-18 17:07:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:25,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:25,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:25,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 17:07:25,851 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,SelfDestructingSolverStorable35 [2022-01-18 17:07:25,851 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1350073971, now seen corresponding path program 35 times [2022-01-18 17:07:25,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:25,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501782894] [2022-01-18 17:07:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:25,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:26,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501782894] [2022-01-18 17:07:26,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501782894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109571445] [2022-01-18 17:07:26,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:07:26,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:26,088 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:26,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 17:07:26,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:07:26,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:26,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:26,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:26,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:26,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:26,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:26,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:26,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:26,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:26,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 17:07:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109571445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:27,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:27,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 17:07:27,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495205765] [2022-01-18 17:07:27,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:07:27,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:07:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:07:27,091 INFO L87 Difference]: Start difference. First operand 2043 states and 4603 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:28,049 INFO L93 Difference]: Finished difference Result 2682 states and 5975 transitions. [2022-01-18 17:07:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:07:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:28,052 INFO L225 Difference]: With dead ends: 2682 [2022-01-18 17:07:28,053 INFO L226 Difference]: Without dead ends: 2649 [2022-01-18 17:07:28,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=650, Invalid=3132, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:07:28,053 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:28,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 216 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 536 Invalid, 0 Unknown, 521 Unchecked, 0.2s Time] [2022-01-18 17:07:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-01-18 17:07:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2201. [2022-01-18 17:07:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.255) internal successors, (4961), 2200 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 4961 transitions. [2022-01-18 17:07:28,086 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 4961 transitions. Word has length 32 [2022-01-18 17:07:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 4961 transitions. [2022-01-18 17:07:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 4961 transitions. [2022-01-18 17:07:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:28,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:28,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:28,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 17:07:28,310 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,SelfDestructingSolverStorable36 [2022-01-18 17:07:28,311 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:28,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1516422259, now seen corresponding path program 36 times [2022-01-18 17:07:28,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:28,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246470911] [2022-01-18 17:07:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:28,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:28,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246470911] [2022-01-18 17:07:28,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246470911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119658952] [2022-01-18 17:07:28,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:07:28,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:28,549 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:28,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 17:07:28,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:07:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:28,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:28,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:28,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:28,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:28,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:29,241 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:29,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:29,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119658952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:29,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:29,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:29,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154864499] [2022-01-18 17:07:29,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:29,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:29,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:29,400 INFO L87 Difference]: Start difference. First operand 2201 states and 4961 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:29,876 INFO L93 Difference]: Finished difference Result 2948 states and 6539 transitions. [2022-01-18 17:07:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:07:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:29,879 INFO L225 Difference]: With dead ends: 2948 [2022-01-18 17:07:29,879 INFO L226 Difference]: Without dead ends: 2823 [2022-01-18 17:07:29,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:07:29,880 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:29,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 316 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 423 Invalid, 0 Unknown, 725 Unchecked, 0.2s Time] [2022-01-18 17:07:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-01-18 17:07:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2454. [2022-01-18 17:07:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 2.2592743579290664) internal successors, (5542), 2453 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 5542 transitions. [2022-01-18 17:07:29,916 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 5542 transitions. Word has length 32 [2022-01-18 17:07:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:29,916 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 5542 transitions. [2022-01-18 17:07:29,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 5542 transitions. [2022-01-18 17:07:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:29,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:29,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:29,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:30,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:30,142 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1972305753, now seen corresponding path program 37 times [2022-01-18 17:07:30,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237108251] [2022-01-18 17:07:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:30,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:30,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237108251] [2022-01-18 17:07:30,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237108251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707878533] [2022-01-18 17:07:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:07:30,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:30,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:30,364 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:30,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 17:07:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:30,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:30,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 17:07:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:30,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:30,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:31,120 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:31,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:31,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:31,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707878533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:31,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:31,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:31,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695025041] [2022-01-18 17:07:31,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:31,279 INFO L87 Difference]: Start difference. First operand 2454 states and 5542 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:31,669 INFO L93 Difference]: Finished difference Result 4067 states and 9106 transitions. [2022-01-18 17:07:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:07:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:31,674 INFO L225 Difference]: With dead ends: 4067 [2022-01-18 17:07:31,674 INFO L226 Difference]: Without dead ends: 4040 [2022-01-18 17:07:31,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:07:31,674 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:31,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 385 Unchecked, 0.1s Time] [2022-01-18 17:07:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-01-18 17:07:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 2635. [2022-01-18 17:07:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.2649962034927866) internal successors, (5966), 2634 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 5966 transitions. [2022-01-18 17:07:31,706 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 5966 transitions. Word has length 32 [2022-01-18 17:07:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:31,706 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 5966 transitions. [2022-01-18 17:07:31,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 5966 transitions. [2022-01-18 17:07:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:31,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:31,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:31,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:31,912 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,SelfDestructingSolverStorable38 [2022-01-18 17:07:31,913 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash 804520611, now seen corresponding path program 38 times [2022-01-18 17:07:31,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:31,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314060136] [2022-01-18 17:07:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:31,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:32,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:32,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314060136] [2022-01-18 17:07:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314060136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288561404] [2022-01-18 17:07:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:07:32,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:32,118 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:32,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 17:07:32,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:07:32,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:32,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:32,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:32,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:32,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:32,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:32,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:32,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:32,746 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:32,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:32,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:32,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288561404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:32,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:32,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:32,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241651999] [2022-01-18 17:07:32,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:32,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:32,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:32,898 INFO L87 Difference]: Start difference. First operand 2635 states and 5966 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:33,281 INFO L93 Difference]: Finished difference Result 3211 states and 7172 transitions. [2022-01-18 17:07:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:07:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:33,285 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 17:07:33,285 INFO L226 Difference]: Without dead ends: 3145 [2022-01-18 17:07:33,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:07:33,286 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:33,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 341 Invalid, 0 Unknown, 617 Unchecked, 0.1s Time] [2022-01-18 17:07:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-01-18 17:07:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2696. [2022-01-18 17:07:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2608534322820035) internal successors, (6093), 2695 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6093 transitions. [2022-01-18 17:07:33,315 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6093 transitions. Word has length 32 [2022-01-18 17:07:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6093 transitions. [2022-01-18 17:07:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6093 transitions. [2022-01-18 17:07:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:33,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:33,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:33,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 17:07:33,519 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,SelfDestructingSolverStorable39 [2022-01-18 17:07:33,519 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 349061555, now seen corresponding path program 39 times [2022-01-18 17:07:33,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:33,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330404304] [2022-01-18 17:07:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:33,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:33,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330404304] [2022-01-18 17:07:33,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330404304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491808600] [2022-01-18 17:07:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:33,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:33,736 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:33,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 17:07:33,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:07:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:34,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:34,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:34,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:34,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-01-18 17:07:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:34,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:34,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:34,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-01-18 17:07:35,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:35,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 17:07:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491808600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:35,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:35,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-01-18 17:07:35,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817658073] [2022-01-18 17:07:35,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:35,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:07:35,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:07:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:07:35,233 INFO L87 Difference]: Start difference. First operand 2696 states and 6093 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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) [2022-01-18 17:07:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:36,867 INFO L93 Difference]: Finished difference Result 3668 states and 8214 transitions. [2022-01-18 17:07:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:07:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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 32 [2022-01-18 17:07:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:36,884 INFO L225 Difference]: With dead ends: 3668 [2022-01-18 17:07:36,884 INFO L226 Difference]: Without dead ends: 3548 [2022-01-18 17:07:36,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1004, Invalid=5002, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:07:36,885 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:36,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 603 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 313 Invalid, 0 Unknown, 1145 Unchecked, 0.1s Time] [2022-01-18 17:07:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-01-18 17:07:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2929. [2022-01-18 17:07:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 2.2575136612021858) internal successors, (6610), 2928 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 6610 transitions. [2022-01-18 17:07:36,915 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 6610 transitions. Word has length 32 [2022-01-18 17:07:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:36,916 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 6610 transitions. [2022-01-18 17:07:36,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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) [2022-01-18 17:07:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 6610 transitions. [2022-01-18 17:07:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:36,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:36,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:36,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 17:07:37,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:37,131 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:37,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2145543437, now seen corresponding path program 40 times [2022-01-18 17:07:37,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071766676] [2022-01-18 17:07:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:37,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:37,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:37,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071766676] [2022-01-18 17:07:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071766676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:37,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648910548] [2022-01-18 17:07:37,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:07:37,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:37,342 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:37,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 17:07:37,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:07:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:37,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:37,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 17:07:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:37,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:37,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:37,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:37,972 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:37,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:38,129 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 17 treesize of output 13 [2022-01-18 17:07:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:38,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648910548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:38,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:38,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900086444] [2022-01-18 17:07:38,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:38,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:38,164 INFO L87 Difference]: Start difference. First operand 2929 states and 6610 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:38,735 INFO L93 Difference]: Finished difference Result 4509 states and 10100 transitions. [2022-01-18 17:07:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:07:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:38,740 INFO L225 Difference]: With dead ends: 4509 [2022-01-18 17:07:38,740 INFO L226 Difference]: Without dead ends: 4467 [2022-01-18 17:07:38,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:07:38,741 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:38,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 296 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 514 Unchecked, 0.2s Time] [2022-01-18 17:07:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-01-18 17:07:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3295. [2022-01-18 17:07:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.2726168791742563) internal successors, (7486), 3294 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 7486 transitions. [2022-01-18 17:07:38,780 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 7486 transitions. Word has length 32 [2022-01-18 17:07:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:38,781 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 7486 transitions. [2022-01-18 17:07:38,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 7486 transitions. [2022-01-18 17:07:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:38,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:38,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:38,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:38,984 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,SelfDestructingSolverStorable41 [2022-01-18 17:07:38,984 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1639171119, now seen corresponding path program 41 times [2022-01-18 17:07:38,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:38,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453888733] [2022-01-18 17:07:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:38,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:39,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:39,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453888733] [2022-01-18 17:07:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453888733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:39,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995957420] [2022-01-18 17:07:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:07:39,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:39,181 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:39,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 17:07:39,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:07:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:39,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:39,455 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 29 treesize of output 27 [2022-01-18 17:07:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:39,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:39,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:39,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:39,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 17:07:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:40,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995957420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:40,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:40,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 17:07:40,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695732749] [2022-01-18 17:07:40,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:40,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:07:40,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:40,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:07:40,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:07:40,229 INFO L87 Difference]: Start difference. First operand 3295 states and 7486 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:41,504 INFO L93 Difference]: Finished difference Result 5882 states and 13176 transitions. [2022-01-18 17:07:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:07:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:41,513 INFO L225 Difference]: With dead ends: 5882 [2022-01-18 17:07:41,513 INFO L226 Difference]: Without dead ends: 5674 [2022-01-18 17:07:41,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=4389, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:07:41,514 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 390 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 719 Invalid, 0 Unknown, 517 Unchecked, 0.3s Time] [2022-01-18 17:07:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-01-18 17:07:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3749. [2022-01-18 17:07:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 2.2716115261472787) internal successors, (8514), 3748 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 8514 transitions. [2022-01-18 17:07:41,563 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 8514 transitions. Word has length 32 [2022-01-18 17:07:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:41,563 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 8514 transitions. [2022-01-18 17:07:41,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 8514 transitions. [2022-01-18 17:07:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:41,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:41,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:41,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 17:07:41,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:41,768 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 251124075, now seen corresponding path program 42 times [2022-01-18 17:07:41,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150095803] [2022-01-18 17:07:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:41,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:42,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150095803] [2022-01-18 17:07:42,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150095803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729835130] [2022-01-18 17:07:42,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:07:42,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:42,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:42,022 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:42,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 17:07:42,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:07:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:42,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:42,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 17:07:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:42,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:42,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:42,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 17:07:42,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:42,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729835130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:42,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:42,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 28 [2022-01-18 17:07:42,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147937802] [2022-01-18 17:07:42,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:42,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:07:42,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:07:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:07:42,834 INFO L87 Difference]: Start difference. First operand 3749 states and 8514 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:43,021 INFO L93 Difference]: Finished difference Result 4320 states and 9774 transitions. [2022-01-18 17:07:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:07:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:43,026 INFO L225 Difference]: With dead ends: 4320 [2022-01-18 17:07:43,026 INFO L226 Difference]: Without dead ends: 4280 [2022-01-18 17:07:43,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:07:43,026 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:43,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 197 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-01-18 17:07:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-01-18 17:07:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3804. [2022-01-18 17:07:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.2713647120694187) internal successors, (8638), 3803 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 8638 transitions. [2022-01-18 17:07:43,065 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 8638 transitions. Word has length 32 [2022-01-18 17:07:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:43,065 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 8638 transitions. [2022-01-18 17:07:43,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 8638 transitions. [2022-01-18 17:07:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:43,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:43,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:43,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 17:07:43,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:43,270 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1453373471, now seen corresponding path program 43 times [2022-01-18 17:07:43,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604924747] [2022-01-18 17:07:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:43,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:43,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604924747] [2022-01-18 17:07:43,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604924747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020310790] [2022-01-18 17:07:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:07:43,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:43,468 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:43,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 17:07:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:43,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:43,730 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 26 treesize of output 26 [2022-01-18 17:07:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:43,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:43,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:44,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:44,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:44,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020310790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:44,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:44,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 17:07:44,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988272444] [2022-01-18 17:07:44,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:44,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:07:44,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:07:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:07:44,358 INFO L87 Difference]: Start difference. First operand 3804 states and 8638 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:44,770 INFO L93 Difference]: Finished difference Result 4154 states and 9383 transitions. [2022-01-18 17:07:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:07:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:44,775 INFO L225 Difference]: With dead ends: 4154 [2022-01-18 17:07:44,775 INFO L226 Difference]: Without dead ends: 4143 [2022-01-18 17:07:44,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:07:44,775 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:44,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 182 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 314 Unchecked, 0.1s Time] [2022-01-18 17:07:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-01-18 17:07:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3797. [2022-01-18 17:07:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.2710748155953637) internal successors, (8621), 3796 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 8621 transitions. [2022-01-18 17:07:44,818 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 8621 transitions. Word has length 32 [2022-01-18 17:07:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:44,819 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 8621 transitions. [2022-01-18 17:07:44,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 8621 transitions. [2022-01-18 17:07:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:44,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:44,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:44,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 17:07:45,023 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,SelfDestructingSolverStorable44 [2022-01-18 17:07:45,024 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash -62131981, now seen corresponding path program 44 times [2022-01-18 17:07:45,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:45,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130922643] [2022-01-18 17:07:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:45,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:45,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130922643] [2022-01-18 17:07:45,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130922643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74582737] [2022-01-18 17:07:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:07:45,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:45,229 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:45,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 17:07:45,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:07:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:45,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:45,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:45,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:45,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:45,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:45,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:45,880 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:45,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:46,051 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 17 treesize of output 13 [2022-01-18 17:07:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:46,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74582737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:46,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:46,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:46,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919205474] [2022-01-18 17:07:46,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:46,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:46,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:46,085 INFO L87 Difference]: Start difference. First operand 3797 states and 8621 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:46,826 INFO L93 Difference]: Finished difference Result 4560 states and 10241 transitions. [2022-01-18 17:07:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:07:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:46,832 INFO L225 Difference]: With dead ends: 4560 [2022-01-18 17:07:46,832 INFO L226 Difference]: Without dead ends: 4520 [2022-01-18 17:07:46,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:07:46,833 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:46,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 263 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 545 Unchecked, 0.1s Time] [2022-01-18 17:07:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-01-18 17:07:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3870. [2022-01-18 17:07:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.271387955544068) internal successors, (8788), 3869 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 8788 transitions. [2022-01-18 17:07:46,874 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 8788 transitions. Word has length 32 [2022-01-18 17:07:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:46,874 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 8788 transitions. [2022-01-18 17:07:46,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 8788 transitions. [2022-01-18 17:07:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:46,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:46,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:46,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:47,079 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,SelfDestructingSolverStorable45 [2022-01-18 17:07:47,079 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1842733581, now seen corresponding path program 45 times [2022-01-18 17:07:47,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712716628] [2022-01-18 17:07:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:47,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:47,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:47,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712716628] [2022-01-18 17:07:47,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712716628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:47,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629009288] [2022-01-18 17:07:47,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:47,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:47,295 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:47,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 17:07:47,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:47,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:47,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:47,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:47,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:47,968 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:47,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:48,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:48,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629009288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:48,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:48,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:48,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887644842] [2022-01-18 17:07:48,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:48,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:48,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:48,218 INFO L87 Difference]: Start difference. First operand 3870 states and 8788 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:48,751 INFO L93 Difference]: Finished difference Result 5581 states and 12529 transitions. [2022-01-18 17:07:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:07:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:48,758 INFO L225 Difference]: With dead ends: 5581 [2022-01-18 17:07:48,758 INFO L226 Difference]: Without dead ends: 5455 [2022-01-18 17:07:48,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:07:48,759 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:48,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 286 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-01-18 17:07:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-01-18 17:07:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3920. [2022-01-18 17:07:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 2.2702219954069918) internal successors, (8897), 3919 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 8897 transitions. [2022-01-18 17:07:48,811 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 8897 transitions. Word has length 32 [2022-01-18 17:07:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:48,811 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 8897 transitions. [2022-01-18 17:07:48,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 8897 transitions. [2022-01-18 17:07:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:48,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:48,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:48,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:49,026 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,SelfDestructingSolverStorable46 [2022-01-18 17:07:49,026 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash 778274133, now seen corresponding path program 46 times [2022-01-18 17:07:49,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:49,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198168464] [2022-01-18 17:07:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:49,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:49,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:49,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198168464] [2022-01-18 17:07:49,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198168464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:49,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326126741] [2022-01-18 17:07:49,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:07:49,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:49,240 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:49,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 17:07:49,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:07:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:49,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:49,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:49,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:49,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:49,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:49,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:49,880 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:49,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:50,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326126741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:50,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:50,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:50,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309491615] [2022-01-18 17:07:50,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:50,097 INFO L87 Difference]: Start difference. First operand 3920 states and 8897 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:50,779 INFO L93 Difference]: Finished difference Result 5422 states and 12182 transitions. [2022-01-18 17:07:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:07:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:50,786 INFO L225 Difference]: With dead ends: 5422 [2022-01-18 17:07:50,786 INFO L226 Difference]: Without dead ends: 5349 [2022-01-18 17:07:50,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:07:50,788 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:50,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 248 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-01-18 17:07:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-01-18 17:07:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4155. [2022-01-18 17:07:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 2.2708233028406357) internal successors, (9433), 4154 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 9433 transitions. [2022-01-18 17:07:50,848 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 9433 transitions. Word has length 32 [2022-01-18 17:07:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:50,848 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 9433 transitions. [2022-01-18 17:07:50,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 9433 transitions. [2022-01-18 17:07:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:50,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:50,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:50,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:51,053 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash 388256609, now seen corresponding path program 47 times [2022-01-18 17:07:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78727493] [2022-01-18 17:07:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:51,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:51,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78727493] [2022-01-18 17:07:51,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78727493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:51,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082198505] [2022-01-18 17:07:51,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:07:51,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:51,284 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:51,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 17:07:51,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:07:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:07:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:51,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:51,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:07:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:51,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:07:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:51,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:51,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:52,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:52,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 17:07:52,240 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 35 treesize of output 31 [2022-01-18 17:07:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:52,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082198505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:52,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:52,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 17:07:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057212590] [2022-01-18 17:07:52,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:07:52,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:07:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:07:52,363 INFO L87 Difference]: Start difference. First operand 4155 states and 9433 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:52,998 INFO L93 Difference]: Finished difference Result 5217 states and 11757 transitions. [2022-01-18 17:07:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:07:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:53,005 INFO L225 Difference]: With dead ends: 5217 [2022-01-18 17:07:53,005 INFO L226 Difference]: Without dead ends: 5195 [2022-01-18 17:07:53,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:07:53,006 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:53,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 504 Unchecked, 0.2s Time] [2022-01-18 17:07:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2022-01-18 17:07:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4255. [2022-01-18 17:07:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 2.2717442407146216) internal successors, (9664), 4254 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 9664 transitions. [2022-01-18 17:07:53,076 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 9664 transitions. Word has length 32 [2022-01-18 17:07:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 9664 transitions. [2022-01-18 17:07:53,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 9664 transitions. [2022-01-18 17:07:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:53,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:53,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:53,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:53,305 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,SelfDestructingSolverStorable48 [2022-01-18 17:07:53,305 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash 36126075, now seen corresponding path program 48 times [2022-01-18 17:07:53,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:53,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030170944] [2022-01-18 17:07:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:53,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:53,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:53,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030170944] [2022-01-18 17:07:53,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030170944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:53,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788573550] [2022-01-18 17:07:53,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:07:53,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:53,506 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:53,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 17:07:53,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:07:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:53,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:53,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:53,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:53,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:54,135 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:54,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:54,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:54,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788573550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:54,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:54,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:54,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315472709] [2022-01-18 17:07:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:54,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:54,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:54,275 INFO L87 Difference]: Start difference. First operand 4255 states and 9664 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:55,062 INFO L93 Difference]: Finished difference Result 6892 states and 15481 transitions. [2022-01-18 17:07:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:07:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:55,072 INFO L225 Difference]: With dead ends: 6892 [2022-01-18 17:07:55,072 INFO L226 Difference]: Without dead ends: 6717 [2022-01-18 17:07:55,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:07:55,073 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:55,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-01-18 17:07:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-01-18 17:07:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 4460. [2022-01-18 17:07:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.270015698587127) internal successors, (10122), 4459 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 10122 transitions. [2022-01-18 17:07:55,156 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 10122 transitions. Word has length 32 [2022-01-18 17:07:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:55,156 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 10122 transitions. [2022-01-18 17:07:55,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 10122 transitions. [2022-01-18 17:07:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:55,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:55,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:55,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 17:07:55,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:07:55,365 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1637833507, now seen corresponding path program 49 times [2022-01-18 17:07:55,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:55,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527291324] [2022-01-18 17:07:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:55,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:55,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527291324] [2022-01-18 17:07:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527291324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378925806] [2022-01-18 17:07:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:07:55,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:55,592 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:55,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 17:07:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:55,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:55,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:55,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:56,258 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:56,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:56,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378925806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:56,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:56,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:56,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818328374] [2022-01-18 17:07:56,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:56,424 INFO L87 Difference]: Start difference. First operand 4460 states and 10122 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:57,165 INFO L93 Difference]: Finished difference Result 6917 states and 15565 transitions. [2022-01-18 17:07:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:07:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:57,174 INFO L225 Difference]: With dead ends: 6917 [2022-01-18 17:07:57,175 INFO L226 Difference]: Without dead ends: 6736 [2022-01-18 17:07:57,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:07:57,175 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:57,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 329 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 688 Invalid, 0 Unknown, 515 Unchecked, 0.3s Time] [2022-01-18 17:07:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-01-18 17:07:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4336. [2022-01-18 17:07:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 2.2622837370242213) internal successors, (9807), 4335 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 9807 transitions. [2022-01-18 17:07:57,248 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 9807 transitions. Word has length 32 [2022-01-18 17:07:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 9807 transitions. [2022-01-18 17:07:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 9807 transitions. [2022-01-18 17:07:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:57,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:57,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:57,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:57,465 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -233872393, now seen corresponding path program 50 times [2022-01-18 17:07:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:57,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531620899] [2022-01-18 17:07:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:57,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:57,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531620899] [2022-01-18 17:07:57,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531620899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983197892] [2022-01-18 17:07:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:07:57,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:57,653 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 17:07:57,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:07:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:07:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:57,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:57,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:07:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:07:57,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:07:57,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 17:07:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:58,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:07:58,257 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:07:58,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 17:07:58,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 17:07:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:07:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983197892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:07:58,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:07:58,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 17:07:58,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122093670] [2022-01-18 17:07:58,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:07:58,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:07:58,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:07:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:07:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:07:58,397 INFO L87 Difference]: Start difference. First operand 4336 states and 9807 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:07:59,064 INFO L93 Difference]: Finished difference Result 6011 states and 13443 transitions. [2022-01-18 17:07:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:07:59,064 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:07:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:07:59,071 INFO L225 Difference]: With dead ends: 6011 [2022-01-18 17:07:59,071 INFO L226 Difference]: Without dead ends: 5882 [2022-01-18 17:07:59,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:07:59,072 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:07:59,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 348 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 803 Unchecked, 0.2s Time] [2022-01-18 17:07:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-01-18 17:07:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4195. [2022-01-18 17:07:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.259656652360515) internal successors, (9477), 4194 states have internal predecessors, (9477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 9477 transitions. [2022-01-18 17:07:59,145 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 9477 transitions. Word has length 32 [2022-01-18 17:07:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:07:59,145 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 9477 transitions. [2022-01-18 17:07:59,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:07:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 9477 transitions. [2022-01-18 17:07:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:07:59,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:07:59,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:07:59,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 17:07:59,371 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,SelfDestructingSolverStorable51 [2022-01-18 17:07:59,371 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:07:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:07:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -13819161, now seen corresponding path program 51 times [2022-01-18 17:07:59,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:07:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688502973] [2022-01-18 17:07:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:07:59,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:07:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:07:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:07:59,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:07:59,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688502973] [2022-01-18 17:07:59,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688502973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:07:59,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769320334] [2022-01-18 17:07:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:07:59,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:07:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:07:59,586 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:07:59,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:07:59,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:07:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:07:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:07:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:07:59,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:59,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:07:59,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:07:59,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-01-18 17:08:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:08:00,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-18 17:19:30,251 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 17:19:30,252 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 17:19:30,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 17:19:30,276 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:19:30,288 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:19:30,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:30,453 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 8ms.. [2022-01-18 17:19:30,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 17:19:30,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 17:19:30,457 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2022-01-18 17:19:30,459 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:19:30,459 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:19:30,461 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:19:30 BasicIcfg [2022-01-18 17:19:30,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:19:30,461 INFO L158 Benchmark]: Toolchain (without parser) took 789465.98ms. Allocated memory was 348.1MB in the beginning and 591.4MB in the end (delta: 243.3MB). Free memory was 307.9MB in the beginning and 238.3MB in the end (delta: 69.6MB). Peak memory consumption was 363.1MB. Max. memory is 16.0GB. [2022-01-18 17:19:30,461 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 309.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:19:30,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.16ms. Allocated memory is still 348.1MB. Free memory was 307.9MB in the beginning and 306.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:19:30,461 INFO L158 Benchmark]: Boogie Preprocessor took 13.05ms. Allocated memory is still 348.1MB. Free memory was 306.3MB in the beginning and 305.4MB in the end (delta: 948.9kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:19:30,461 INFO L158 Benchmark]: RCFGBuilder took 270.00ms. Allocated memory is still 348.1MB. Free memory was 305.4MB in the beginning and 296.0MB in the end (delta: 9.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 17:19:30,461 INFO L158 Benchmark]: TraceAbstraction took 789150.89ms. Allocated memory was 348.1MB in the beginning and 591.4MB in the end (delta: 243.3MB). Free memory was 295.5MB in the beginning and 238.3MB in the end (delta: 57.2MB). Peak memory consumption was 350.5MB. Max. memory is 16.0GB. [2022-01-18 17:19:30,462 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 0.15ms. Allocated memory is still 348.1MB. Free memory is still 309.0MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.16ms. Allocated memory is still 348.1MB. Free memory was 307.9MB in the beginning and 306.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 13.05ms. Allocated memory is still 348.1MB. Free memory was 306.3MB in the beginning and 305.4MB in the end (delta: 948.9kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 270.00ms. Allocated memory is still 348.1MB. Free memory was 305.4MB in the beginning and 296.0MB in the end (delta: 9.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 789150.89ms. Allocated memory was 348.1MB in the beginning and 591.4MB in the end (delta: 243.3MB). Free memory was 295.5MB in the beginning and 238.3MB in the end (delta: 57.2MB). Peak memory consumption was 350.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 8ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 8ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 789.0s, OverallIterations: 53, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.2s, AutomataDifference: 28.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7585 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7585 mSDsluCounter, 11898 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19136 IncrementalHoareTripleChecker+Unchecked, 16771 mSDsCounter, 1584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17660 IncrementalHoareTripleChecker+Invalid, 38380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1584 mSolverCounterUnsat, 1312 mSDtfsCounter, 17660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4938 GetRequests, 2515 SyntacticMatches, 221 SemanticMatches, 2202 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 40328 ImplicationChecksByTransitivity, 37.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4460occurred in iteration=50, InterpolantAutomatonStates: 1537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 52 MinimizatonAttempts, 26546 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 55.2s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 4638 ConstructedInterpolants, 832 QuantifiedInterpolants, 56221 SizeOfPredicates, 862 NumberOfNonLiveVariables, 3371 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1900 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