/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/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:32:23,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:32:23,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:32:23,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 16:32:23,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:32:23,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:32:23,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:32:23,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 16:32:23,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:32:23,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:32:23,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:32:23,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:32:23,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:32:23,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:32:23,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:32:23,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:32:23,731 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:32:23,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:32:23,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:32:23,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:32:23,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:32:23,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:32:23,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:32:23,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:32:23,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:32:23,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:32:23,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:32:23,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:32:23,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:32:23,922 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:32:23,924 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:32:23,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2022-01-18 16:32:23,925 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2022-01-18 16:32:23,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:32:23,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:32:23,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:32:23,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:32:23,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:32:23,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,963 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:32:23,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:32:23,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:32:23,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:32:23,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:32:23,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:32:23,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:32:23,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:32:23,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:32:23,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/1) ... [2022-01-18 16:32:23,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:32:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:24,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 16:32:24,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 16:32:24,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:32:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:32:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:32:24,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:32:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:32:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:32:24,032 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:32:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:32:24,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:32:24,032 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:32:24,067 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:32:24,068 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:32:24,147 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:32:24,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:32:24,159 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:32:24,161 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:32:24 BoogieIcfgContainer [2022-01-18 16:32:24,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:32:24,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:32:24,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:32:24,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:32:24,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:32:23" (1/2) ... [2022-01-18 16:32:24,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5f3cb5 and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:32:24, skipping insertion in model container [2022-01-18 16:32:24,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:32:24" (2/2) ... [2022-01-18 16:32:24,187 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2022-01-18 16:32:24,190 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:32:24,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:32:24,190 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:32:24,190 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:32:24,211 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:32:24,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:32:24,246 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:32:24,247 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:32:24,257 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-18 16:32:24,274 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 16:32:24,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:24,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:24,286 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1388939217, now seen corresponding path program 1 times [2022-01-18 16:32:24,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174836928] [2022-01-18 16:32:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:24,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:24,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:24,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174836928] [2022-01-18 16:32:24,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174836928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:32:24,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:32:24,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:32:24,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652982269] [2022-01-18 16:32:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:32:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:32:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:32:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,471 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:24,531 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2022-01-18 16:32:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:32:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 16:32:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:24,541 INFO L225 Difference]: With dead ends: 89 [2022-01-18 16:32:24,541 INFO L226 Difference]: Without dead ends: 82 [2022-01-18 16:32:24,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,546 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:24,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:32:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-18 16:32:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2022-01-18 16:32:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2022-01-18 16:32:24,612 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 11 [2022-01-18 16:32:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:24,613 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2022-01-18 16:32:24,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2022-01-18 16:32:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:32:24,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:24,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:24,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:32:24,616 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash 736893362, now seen corresponding path program 1 times [2022-01-18 16:32:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448907923] [2022-01-18 16:32:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:24,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:24,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448907923] [2022-01-18 16:32:24,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448907923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:32:24,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:32:24,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:32:24,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763748865] [2022-01-18 16:32:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:32:24,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:32:24,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:24,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:32:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,668 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:24,687 INFO L93 Difference]: Finished difference Result 76 states and 142 transitions. [2022-01-18 16:32:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:32:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:32:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:24,689 INFO L225 Difference]: With dead ends: 76 [2022-01-18 16:32:24,690 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 16:32:24,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:24,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:32:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 16:32:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-01-18 16:32:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.935483870967742) internal successors, (120), 62 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 120 transitions. [2022-01-18 16:32:24,704 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 120 transitions. Word has length 15 [2022-01-18 16:32:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:24,704 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 120 transitions. [2022-01-18 16:32:24,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 120 transitions. [2022-01-18 16:32:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:32:24,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:24,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:24,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:32:24,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash -67130382, now seen corresponding path program 1 times [2022-01-18 16:32:24,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045632626] [2022-01-18 16:32:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:24,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:24,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045632626] [2022-01-18 16:32:24,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045632626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:32:24,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:32:24,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:32:24,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646562786] [2022-01-18 16:32:24,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:32:24,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:32:24,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:32:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,742 INFO L87 Difference]: Start difference. First operand 63 states and 120 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:24,760 INFO L93 Difference]: Finished difference Result 64 states and 116 transitions. [2022-01-18 16:32:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:32:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:32:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:24,762 INFO L225 Difference]: With dead ends: 64 [2022-01-18 16:32:24,762 INFO L226 Difference]: Without dead ends: 58 [2022-01-18 16:32:24,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:32:24,765 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:24,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:32:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-18 16:32:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-18 16:32:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.8596491228070176) internal successors, (106), 57 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 106 transitions. [2022-01-18 16:32:24,770 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 106 transitions. Word has length 15 [2022-01-18 16:32:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:24,770 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 106 transitions. [2022-01-18 16:32:24,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 106 transitions. [2022-01-18 16:32:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:24,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:24,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:24,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:32:24,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash 684246005, now seen corresponding path program 1 times [2022-01-18 16:32:24,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:24,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056929601] [2022-01-18 16:32:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:24,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:25,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056929601] [2022-01-18 16:32:25,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056929601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337706774] [2022-01-18 16:32:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:25,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:25,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:25,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:25,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:32:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:25,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:32:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:25,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:25,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:32:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:25,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:25,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:25,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:25,728 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 43 treesize of output 41 [2022-01-18 16:32:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:25,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337706774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:25,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:25,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 16:32:25,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28422657] [2022-01-18 16:32:25,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:25,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:32:25,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:32:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:32:25,874 INFO L87 Difference]: Start difference. First operand 58 states and 106 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:26,498 INFO L93 Difference]: Finished difference Result 161 states and 298 transitions. [2022-01-18 16:32:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:32:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:26,499 INFO L225 Difference]: With dead ends: 161 [2022-01-18 16:32:26,499 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 16:32:26,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:32:26,500 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 168 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:26,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 149 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:32:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 16:32:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2022-01-18 16:32:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2022-01-18 16:32:26,506 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2022-01-18 16:32:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:26,506 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2022-01-18 16:32:26,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2022-01-18 16:32:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:26,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:26,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:26,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:26,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:26,707 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1947264813, now seen corresponding path program 2 times [2022-01-18 16:32:26,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:26,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145824233] [2022-01-18 16:32:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:26,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:26,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145824233] [2022-01-18 16:32:26,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145824233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249128181] [2022-01-18 16:32:26,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:32:26,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:26,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:26,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:32:26,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:26,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:32:26,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:32:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:27,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:27,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:27,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-18 16:32:27,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:27,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 16:32:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249128181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:27,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:27,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 16:32:27,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313099671] [2022-01-18 16:32:27,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:27,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:32:27,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:32:27,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:32:27,440 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:27,944 INFO L93 Difference]: Finished difference Result 171 states and 318 transitions. [2022-01-18 16:32:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 19 [2022-01-18 16:32:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:27,945 INFO L225 Difference]: With dead ends: 171 [2022-01-18 16:32:27,945 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 16:32:27,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:27,947 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:27,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:32:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 16:32:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-01-18 16:32:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 96 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 188 transitions. [2022-01-18 16:32:27,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 188 transitions. Word has length 19 [2022-01-18 16:32:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:27,971 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 188 transitions. [2022-01-18 16:32:27,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 188 transitions. [2022-01-18 16:32:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:27,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:27,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:27,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:28,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -56706093, now seen corresponding path program 3 times [2022-01-18 16:32:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382013894] [2022-01-18 16:32:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:28,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:28,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382013894] [2022-01-18 16:32:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382013894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560076313] [2022-01-18 16:32:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:32:28,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:28,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:28,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:32:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:32:28,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:28,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:32:28,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:32:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:28,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:28,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-18 16:32:28,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:28,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 16:32:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:28,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560076313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:28,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:28,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 16:32:28,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054950960] [2022-01-18 16:32:28,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:28,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:32:28,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:32:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:32:28,751 INFO L87 Difference]: Start difference. First operand 97 states and 188 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:29,044 INFO L93 Difference]: Finished difference Result 191 states and 371 transitions. [2022-01-18 16:32:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:29,045 INFO L225 Difference]: With dead ends: 191 [2022-01-18 16:32:29,045 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 16:32:29,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:32:29,046 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:29,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 16:32:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 108. [2022-01-18 16:32:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0186915887850465) internal successors, (216), 107 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 216 transitions. [2022-01-18 16:32:29,050 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 216 transitions. Word has length 19 [2022-01-18 16:32:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:29,051 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 216 transitions. [2022-01-18 16:32:29,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 216 transitions. [2022-01-18 16:32:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:29,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:29,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:29,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:29,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:29,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1019005063, now seen corresponding path program 4 times [2022-01-18 16:32:29,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529928474] [2022-01-18 16:32:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:29,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:29,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529928474] [2022-01-18 16:32:29,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529928474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989038844] [2022-01-18 16:32:29,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:32:29,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:29,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:29,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:32:29,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:32:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:29,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:29,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 16:32:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:29,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:29,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:29,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-18 16:32:29,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:29,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 16:32:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989038844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:29,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:29,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 16:32:29,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141253556] [2022-01-18 16:32:29,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:29,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:32:29,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:32:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:32:29,927 INFO L87 Difference]: Start difference. First operand 108 states and 216 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:30,347 INFO L93 Difference]: Finished difference Result 185 states and 353 transitions. [2022-01-18 16:32:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 19 [2022-01-18 16:32:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:30,349 INFO L225 Difference]: With dead ends: 185 [2022-01-18 16:32:30,349 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 16:32:30,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:30,350 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:30,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 138 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 16:32:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 108. [2022-01-18 16:32:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0186915887850465) internal successors, (216), 107 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 216 transitions. [2022-01-18 16:32:30,354 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 216 transitions. Word has length 19 [2022-01-18 16:32:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:30,354 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 216 transitions. [2022-01-18 16:32:30,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 216 transitions. [2022-01-18 16:32:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:30,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:30,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:30,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:30,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:30,567 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1594125323, now seen corresponding path program 5 times [2022-01-18 16:32:30,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542170299] [2022-01-18 16:32:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:30,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:30,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542170299] [2022-01-18 16:32:30,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542170299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938178016] [2022-01-18 16:32:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:32:30,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:30,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:30,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:32:30,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:32:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:30,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:30,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:32:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:30,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:31,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:31,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:31,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:31,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 16:32:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:31,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938178016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:31,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:31,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-18 16:32:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094653617] [2022-01-18 16:32:31,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:31,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:32:31,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:32:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:32:31,274 INFO L87 Difference]: Start difference. First operand 108 states and 216 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:32,305 INFO L93 Difference]: Finished difference Result 289 states and 557 transitions. [2022-01-18 16:32:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:32:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:32,307 INFO L225 Difference]: With dead ends: 289 [2022-01-18 16:32:32,307 INFO L226 Difference]: Without dead ends: 272 [2022-01-18 16:32:32,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:32:32,308 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:32,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 161 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:32:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-18 16:32:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 119. [2022-01-18 16:32:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 118 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 244 transitions. [2022-01-18 16:32:32,312 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 244 transitions. Word has length 19 [2022-01-18 16:32:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:32,313 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 244 transitions. [2022-01-18 16:32:32,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 244 transitions. [2022-01-18 16:32:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:32,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:32,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:32,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:32,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:32,529 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1262801871, now seen corresponding path program 6 times [2022-01-18 16:32:32,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:32,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795307763] [2022-01-18 16:32:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:32,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:32,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795307763] [2022-01-18 16:32:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795307763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746244962] [2022-01-18 16:32:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:32:32,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:32,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:32,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:32:32,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:32:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:32,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 16:32:32,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:32,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:32,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:32,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 16:32:32,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:32,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-18 16:32:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746244962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:33,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:33,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 16:32:33,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210146958] [2022-01-18 16:32:33,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:33,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:32:33,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:32:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:32:33,094 INFO L87 Difference]: Start difference. First operand 119 states and 244 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:33,527 INFO L93 Difference]: Finished difference Result 226 states and 456 transitions. [2022-01-18 16:32:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 16:32:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:33,528 INFO L225 Difference]: With dead ends: 226 [2022-01-18 16:32:33,528 INFO L226 Difference]: Without dead ends: 212 [2022-01-18 16:32:33,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:32:33,529 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:33,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 107 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-18 16:32:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 124. [2022-01-18 16:32:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.0813008130081303) internal successors, (256), 123 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 256 transitions. [2022-01-18 16:32:33,533 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 256 transitions. Word has length 19 [2022-01-18 16:32:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:33,533 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 256 transitions. [2022-01-18 16:32:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 256 transitions. [2022-01-18 16:32:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:33,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:33,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:33,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:33,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:33,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash -675056549, now seen corresponding path program 7 times [2022-01-18 16:32:33,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:33,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124015231] [2022-01-18 16:32:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:33,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:33,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124015231] [2022-01-18 16:32:33,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124015231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141931139] [2022-01-18 16:32:33,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:32:33,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:33,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:33,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:33,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:32:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 16:32:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:33,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:32:33,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 16:32:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:34,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:34,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:34,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-18 16:32:34,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:34,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 16:32:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:34,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141931139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:34,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:34,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 16:32:34,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419843616] [2022-01-18 16:32:34,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:34,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:32:34,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:32:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:32:34,367 INFO L87 Difference]: Start difference. First operand 124 states and 256 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:34,759 INFO L93 Difference]: Finished difference Result 226 states and 446 transitions. [2022-01-18 16:32:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:34,760 INFO L225 Difference]: With dead ends: 226 [2022-01-18 16:32:34,760 INFO L226 Difference]: Without dead ends: 219 [2022-01-18 16:32:34,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:32:34,761 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:34,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 160 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-18 16:32:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 127. [2022-01-18 16:32:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 126 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 262 transitions. [2022-01-18 16:32:34,764 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 262 transitions. Word has length 19 [2022-01-18 16:32:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 262 transitions. [2022-01-18 16:32:34,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 262 transitions. [2022-01-18 16:32:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:34,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:34,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:34,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:34,982 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash 400654607, now seen corresponding path program 8 times [2022-01-18 16:32:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108969259] [2022-01-18 16:32:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:34,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:35,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108969259] [2022-01-18 16:32:35,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108969259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285302164] [2022-01-18 16:32:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:32:35,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:35,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:35,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:32:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:35,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:32:35,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:35,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:35,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:35,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:35,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:35,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 16:32:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285302164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:35,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:35,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 16:32:35,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339646202] [2022-01-18 16:32:35,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:32:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:32:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:32:35,635 INFO L87 Difference]: Start difference. First operand 127 states and 262 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:36,064 INFO L93 Difference]: Finished difference Result 218 states and 429 transitions. [2022-01-18 16:32:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 19 [2022-01-18 16:32:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:36,065 INFO L225 Difference]: With dead ends: 218 [2022-01-18 16:32:36,065 INFO L226 Difference]: Without dead ends: 211 [2022-01-18 16:32:36,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:36,066 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:36,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 169 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-18 16:32:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 126. [2022-01-18 16:32:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.08) internal successors, (260), 125 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 260 transitions. [2022-01-18 16:32:36,069 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 260 transitions. Word has length 19 [2022-01-18 16:32:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:36,069 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 260 transitions. [2022-01-18 16:32:36,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 260 transitions. [2022-01-18 16:32:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:36,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:36,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:36,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:36,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 16:32:36,286 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2003753969, now seen corresponding path program 9 times [2022-01-18 16:32:36,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181802761] [2022-01-18 16:32:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:36,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:36,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181802761] [2022-01-18 16:32:36,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181802761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840916392] [2022-01-18 16:32:36,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:32:36,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:36,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:36,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:36,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:32:36,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:32:36,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:36,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:32:36,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 16:32:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:36,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:36,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:36,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-18 16:32:36,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:36,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-18 16:32:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840916392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:36,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:36,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 16:32:36,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832328967] [2022-01-18 16:32:36,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:32:36,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:32:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:32:36,827 INFO L87 Difference]: Start difference. First operand 126 states and 260 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:37,160 INFO L93 Difference]: Finished difference Result 225 states and 453 transitions. [2022-01-18 16:32:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:32:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:37,161 INFO L225 Difference]: With dead ends: 225 [2022-01-18 16:32:37,161 INFO L226 Difference]: Without dead ends: 211 [2022-01-18 16:32:37,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:32:37,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:37,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 116 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-18 16:32:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2022-01-18 16:32:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.078740157480315) internal successors, (264), 127 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 264 transitions. [2022-01-18 16:32:37,165 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 264 transitions. Word has length 19 [2022-01-18 16:32:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:37,165 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 264 transitions. [2022-01-18 16:32:37,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 264 transitions. [2022-01-18 16:32:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:37,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:37,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:37,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:37,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:37,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash -928042813, now seen corresponding path program 10 times [2022-01-18 16:32:37,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:37,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077321452] [2022-01-18 16:32:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:37,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:37,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077321452] [2022-01-18 16:32:37,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077321452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18752497] [2022-01-18 16:32:37,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:32:37,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:37,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:37,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:32:37,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:32:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 16:32:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:37,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:37,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 16:32:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:37,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:37,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:37,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:37,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:37,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-01-18 16:32:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18752497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:38,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:38,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 16:32:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657912111] [2022-01-18 16:32:38,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:32:38,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:32:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:32:38,020 INFO L87 Difference]: Start difference. First operand 128 states and 264 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:38,431 INFO L93 Difference]: Finished difference Result 218 states and 429 transitions. [2022-01-18 16:32:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 16:32:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 19 [2022-01-18 16:32:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:38,432 INFO L225 Difference]: With dead ends: 218 [2022-01-18 16:32:38,433 INFO L226 Difference]: Without dead ends: 211 [2022-01-18 16:32:38,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:38,433 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:38,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 154 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:32:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-18 16:32:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 127. [2022-01-18 16:32:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 126 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 262 transitions. [2022-01-18 16:32:38,437 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 262 transitions. Word has length 19 [2022-01-18 16:32:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:38,437 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 262 transitions. [2022-01-18 16:32:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 16:32:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 262 transitions. [2022-01-18 16:32:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:32:38,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:38,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:38,458 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 16:32:38,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 16:32:38,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 753794097, now seen corresponding path program 11 times [2022-01-18 16:32:38,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911206262] [2022-01-18 16:32:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:38,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:38,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911206262] [2022-01-18 16:32:38,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911206262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246197708] [2022-01-18 16:32:38,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:32:38,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:38,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:32:38,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:38,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 16:32:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:38,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 16:32:38,864 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 11 treesize of output 7 [2022-01-18 16:32:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:38,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:39,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:39,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:39,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:39,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 16:32:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:39,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246197708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:39,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-18 16:32:39,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54648574] [2022-01-18 16:32:39,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:39,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:32:39,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:32:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:32:39,314 INFO L87 Difference]: Start difference. First operand 127 states and 262 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:40,301 INFO L93 Difference]: Finished difference Result 314 states and 615 transitions. [2022-01-18 16:32:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:32:40,301 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:32:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:40,303 INFO L225 Difference]: With dead ends: 314 [2022-01-18 16:32:40,303 INFO L226 Difference]: Without dead ends: 297 [2022-01-18 16:32:40,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:32:40,304 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 148 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:40,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 189 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:32:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-18 16:32:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 136. [2022-01-18 16:32:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.096296296296296) internal successors, (283), 135 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 283 transitions. [2022-01-18 16:32:40,307 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 283 transitions. Word has length 19 [2022-01-18 16:32:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:40,308 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 283 transitions. [2022-01-18 16:32:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 283 transitions. [2022-01-18 16:32:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:32:40,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:40,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:40,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:40,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 16:32:40,523 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1973771080, now seen corresponding path program 12 times [2022-01-18 16:32:40,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:40,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120143617] [2022-01-18 16:32:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:40,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:40,548 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 16:32:40,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120143617] [2022-01-18 16:32:40,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120143617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573451181] [2022-01-18 16:32:40,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:32:40,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:40,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:40,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:32:40,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:32:40,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:32:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:40,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:32:40,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573451181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:32:40,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:32:40,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-01-18 16:32:40,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234882435] [2022-01-18 16:32:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:32:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:32:40,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:32:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:32:40,597 INFO L87 Difference]: Start difference. First operand 136 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:40,609 INFO L93 Difference]: Finished difference Result 229 states and 448 transitions. [2022-01-18 16:32:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:32:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:32:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:40,610 INFO L225 Difference]: With dead ends: 229 [2022-01-18 16:32:40,610 INFO L226 Difference]: Without dead ends: 219 [2022-01-18 16:32:40,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:32:40,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:40,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:32:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-18 16:32:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2022-01-18 16:32:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.049382716049383) internal successors, (332), 162 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 332 transitions. [2022-01-18 16:32:40,616 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 332 transitions. Word has length 23 [2022-01-18 16:32:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:40,616 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 332 transitions. [2022-01-18 16:32:40,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 332 transitions. [2022-01-18 16:32:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:32:40,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:40,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:40,637 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 16:32:40,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 16:32:40,827 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 814555854, now seen corresponding path program 13 times [2022-01-18 16:32:40,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014970481] [2022-01-18 16:32:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:40,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:40,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014970481] [2022-01-18 16:32:40,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014970481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450642195] [2022-01-18 16:32:40,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:32:40,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:40,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:40,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:32:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:32:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:32:40,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:32:40,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450642195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:32:40,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:32:40,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-01-18 16:32:40,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344664988] [2022-01-18 16:32:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:32:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:32:40,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:32:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:32:40,895 INFO L87 Difference]: Start difference. First operand 163 states and 332 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:40,916 INFO L93 Difference]: Finished difference Result 259 states and 499 transitions. [2022-01-18 16:32:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:32:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:32:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:40,917 INFO L225 Difference]: With dead ends: 259 [2022-01-18 16:32:40,917 INFO L226 Difference]: Without dead ends: 244 [2022-01-18 16:32:40,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:32:40,918 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:40,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:32:40,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-18 16:32:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2022-01-18 16:32:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0274725274725274) internal successors, (369), 182 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 369 transitions. [2022-01-18 16:32:40,922 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 369 transitions. Word has length 23 [2022-01-18 16:32:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 369 transitions. [2022-01-18 16:32:40,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 369 transitions. [2022-01-18 16:32:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:40,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:40,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:40,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:41,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 16:32:41,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1412568645, now seen corresponding path program 14 times [2022-01-18 16:32:41,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967137772] [2022-01-18 16:32:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:41,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:41,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967137772] [2022-01-18 16:32:41,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967137772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473443572] [2022-01-18 16:32:41,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:32:41,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:41,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:41,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:32:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:32:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:41,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:41,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:32:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:41,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:41,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:41,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:42,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:42,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:32:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:42,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473443572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:42,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:42,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2022-01-18 16:32:42,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629387488] [2022-01-18 16:32:42,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:42,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:32:42,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:32:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:32:42,195 INFO L87 Difference]: Start difference. First operand 183 states and 369 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:43,583 INFO L93 Difference]: Finished difference Result 308 states and 584 transitions. [2022-01-18 16:32:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:32:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:32:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:43,585 INFO L225 Difference]: With dead ends: 308 [2022-01-18 16:32:43,585 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 16:32:43,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=948, Invalid=5694, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:32:43,586 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 271 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:43,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 162 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:32:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 16:32:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 180. [2022-01-18 16:32:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 359 transitions. [2022-01-18 16:32:43,591 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 359 transitions. Word has length 27 [2022-01-18 16:32:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:43,591 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 359 transitions. [2022-01-18 16:32:43,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 359 transitions. [2022-01-18 16:32:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:43,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:43,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:43,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:43,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:43,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash 612406691, now seen corresponding path program 15 times [2022-01-18 16:32:43,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951303022] [2022-01-18 16:32:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:43,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:44,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951303022] [2022-01-18 16:32:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951303022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469713605] [2022-01-18 16:32:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:32:44,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:44,114 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:44,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:32:44,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:32:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:32:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:44,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:44,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:44,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:44,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:44,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-01-18 16:32:44,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:44,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:32:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:44,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469713605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:44,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:44,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-01-18 16:32:44,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416320084] [2022-01-18 16:32:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:44,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:32:44,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:32:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:44,839 INFO L87 Difference]: Start difference. First operand 180 states and 359 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:46,402 INFO L93 Difference]: Finished difference Result 399 states and 757 transitions. [2022-01-18 16:32:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:32:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:32:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:46,403 INFO L225 Difference]: With dead ends: 399 [2022-01-18 16:32:46,403 INFO L226 Difference]: Without dead ends: 383 [2022-01-18 16:32:46,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=866, Invalid=6444, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:32:46,405 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 179 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:46,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 168 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:32:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-18 16:32:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 188. [2022-01-18 16:32:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.9893048128342246) internal successors, (372), 187 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 372 transitions. [2022-01-18 16:32:46,409 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 372 transitions. Word has length 27 [2022-01-18 16:32:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:46,409 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 372 transitions. [2022-01-18 16:32:46,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 372 transitions. [2022-01-18 16:32:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:46,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:46,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:46,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:46,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 16:32:46,626 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1200152013, now seen corresponding path program 16 times [2022-01-18 16:32:46,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:46,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472412091] [2022-01-18 16:32:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:46,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:46,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472412091] [2022-01-18 16:32:46,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472412091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058439612] [2022-01-18 16:32:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:32:46,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:46,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:46,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:46,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:32:46,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:32:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:32:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:47,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:47,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:47,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:47,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:47,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-01-18 16:32:47,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:47,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:32:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:32:47,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058439612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:47,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:47,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-01-18 16:32:47,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582039360] [2022-01-18 16:32:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:47,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:32:47,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:32:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:32:47,613 INFO L87 Difference]: Start difference. First operand 188 states and 372 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:48,982 INFO L93 Difference]: Finished difference Result 408 states and 761 transitions. [2022-01-18 16:32:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:32:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:32:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:48,984 INFO L225 Difference]: With dead ends: 408 [2022-01-18 16:32:48,984 INFO L226 Difference]: Without dead ends: 395 [2022-01-18 16:32:48,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=778, Invalid=6704, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:32:48,986 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:48,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 191 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:32:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-18 16:32:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 212. [2022-01-18 16:32:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.962085308056872) internal successors, (414), 211 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 414 transitions. [2022-01-18 16:32:48,991 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 414 transitions. Word has length 27 [2022-01-18 16:32:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:48,991 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 414 transitions. [2022-01-18 16:32:48,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 414 transitions. [2022-01-18 16:32:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:48,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:48,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:49,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:49,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:49,202 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash -13235113, now seen corresponding path program 17 times [2022-01-18 16:32:49,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926568005] [2022-01-18 16:32:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:49,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:49,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926568005] [2022-01-18 16:32:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926568005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386009948] [2022-01-18 16:32:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:32:49,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:49,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:49,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:32:49,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:32:49,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 16:32:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:49,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:32:49,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:50,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:50,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:32:50,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:50,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 16:32:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:50,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386009948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:50,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:50,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-18 16:32:50,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117156288] [2022-01-18 16:32:50,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:32:50,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:32:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:32:50,436 INFO L87 Difference]: Start difference. First operand 212 states and 414 transitions. Second operand has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 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 16:32:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:52,361 INFO L93 Difference]: Finished difference Result 513 states and 927 transitions. [2022-01-18 16:32:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:32:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 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 27 [2022-01-18 16:32:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:52,376 INFO L225 Difference]: With dead ends: 513 [2022-01-18 16:32:52,376 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 16:32:52,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1491, Invalid=7065, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:32:52,379 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 226 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:52,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 227 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1040 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2022-01-18 16:32:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 16:32:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 264. [2022-01-18 16:32:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.9239543726235742) internal successors, (506), 263 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 506 transitions. [2022-01-18 16:32:52,384 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 506 transitions. Word has length 27 [2022-01-18 16:32:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:52,384 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 506 transitions. [2022-01-18 16:32:52,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 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 16:32:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 506 transitions. [2022-01-18 16:32:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:52,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:52,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:52,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:52,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:52,598 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1341932533, now seen corresponding path program 18 times [2022-01-18 16:32:52,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:52,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700342701] [2022-01-18 16:32:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:52,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:52,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700342701] [2022-01-18 16:32:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700342701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287437052] [2022-01-18 16:32:52,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:32:52,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:52,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:52,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:32:52,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:32:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:32:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:53,332 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:32:53,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 26 [2022-01-18 16:32:53,366 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:32:53,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-01-18 16:32:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:53,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:54,019 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:32:54,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 86 [2022-01-18 16:32:54,433 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:32:54,433 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 128 treesize of output 114 [2022-01-18 16:32:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:54,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287437052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:54,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:54,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-01-18 16:32:54,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235034815] [2022-01-18 16:32:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:54,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 16:32:54,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 16:32:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:32:54,694 INFO L87 Difference]: Start difference. First operand 264 states and 506 transitions. Second operand has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:58,993 INFO L93 Difference]: Finished difference Result 578 states and 1032 transitions. [2022-01-18 16:32:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:32:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 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 27 [2022-01-18 16:32:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:58,995 INFO L225 Difference]: With dead ends: 578 [2022-01-18 16:32:58,995 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 16:32:58,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3141 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1380, Invalid=11052, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:32:58,997 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:58,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 202 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:32:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 16:32:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 286. [2022-01-18 16:32:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.912280701754386) internal successors, (545), 285 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 545 transitions. [2022-01-18 16:32:59,002 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 545 transitions. Word has length 27 [2022-01-18 16:32:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:59,002 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 545 transitions. [2022-01-18 16:32:59,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 545 transitions. [2022-01-18 16:32:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:32:59,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:59,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:59,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:59,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:59,215 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:32:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1639916165, now seen corresponding path program 19 times [2022-01-18 16:32:59,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618321308] [2022-01-18 16:32:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:59,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:59,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:59,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618321308] [2022-01-18 16:32:59,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618321308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482353311] [2022-01-18 16:32:59,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:32:59,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:59,509 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:32:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:32:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:32:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:59,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:32:59,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:32:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:59,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:59,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:00,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:00,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:33:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482353311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:00,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:00,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:33:00,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080965012] [2022-01-18 16:33:00,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:33:00,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:33:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:33:00,220 INFO L87 Difference]: Start difference. First operand 286 states and 545 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:01,829 INFO L93 Difference]: Finished difference Result 530 states and 969 transitions. [2022-01-18 16:33:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:33:01,829 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:01,831 INFO L225 Difference]: With dead ends: 530 [2022-01-18 16:33:01,831 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 16:33:01,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=6166, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:33:01,832 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:01,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 281 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:33:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 16:33:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 297. [2022-01-18 16:33:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.912162162162162) internal successors, (566), 296 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 566 transitions. [2022-01-18 16:33:01,840 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 566 transitions. Word has length 27 [2022-01-18 16:33:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:01,840 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 566 transitions. [2022-01-18 16:33:01,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 566 transitions. [2022-01-18 16:33:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:01,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:01,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:01,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:02,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:02,045 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash -757850441, now seen corresponding path program 20 times [2022-01-18 16:33:02,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716582752] [2022-01-18 16:33:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:02,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:02,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716582752] [2022-01-18 16:33:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716582752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:02,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924611864] [2022-01-18 16:33:02,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:33:02,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:02,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:02,349 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:02,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:33:02,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:33:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:02,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:02,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:02,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:02,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:02,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:02,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:02,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:33:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:03,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924611864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:03,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:03,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:33:03,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371227492] [2022-01-18 16:33:03,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:03,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:33:03,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:33:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:33:03,062 INFO L87 Difference]: Start difference. First operand 297 states and 566 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:05,034 INFO L93 Difference]: Finished difference Result 620 states and 1155 transitions. [2022-01-18 16:33:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:33:05,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:05,036 INFO L225 Difference]: With dead ends: 620 [2022-01-18 16:33:05,036 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 16:33:05,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1224, Invalid=7706, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 16:33:05,036 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 257 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:05,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 227 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:33:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 16:33:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 308. [2022-01-18 16:33:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.9120521172638436) internal successors, (587), 307 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 587 transitions. [2022-01-18 16:33:05,042 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 587 transitions. Word has length 27 [2022-01-18 16:33:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:05,042 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 587 transitions. [2022-01-18 16:33:05,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 587 transitions. [2022-01-18 16:33:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:05,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:05,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:05,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:05,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 16:33:05,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -170105119, now seen corresponding path program 21 times [2022-01-18 16:33:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411902430] [2022-01-18 16:33:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:05,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:05,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411902430] [2022-01-18 16:33:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411902430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117694707] [2022-01-18 16:33:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:33:05,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:05,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:05,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:33:05,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:33:05,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:05,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:33:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:05,899 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 50 treesize of output 34 [2022-01-18 16:33:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:05,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:05,957 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 37 treesize of output 19 [2022-01-18 16:33:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:06,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:06,343 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:33:06,343 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 54 treesize of output 74 [2022-01-18 16:33:06,516 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:33:06,516 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 104 treesize of output 108 [2022-01-18 16:33:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:07,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117694707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:07,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:07,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 35 [2022-01-18 16:33:07,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225498019] [2022-01-18 16:33:07,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:07,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:33:07,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:33:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:33:07,068 INFO L87 Difference]: Start difference. First operand 308 states and 587 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:08,367 INFO L93 Difference]: Finished difference Result 399 states and 738 transitions. [2022-01-18 16:33:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 16:33:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:08,369 INFO L225 Difference]: With dead ends: 399 [2022-01-18 16:33:08,369 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 16:33:08,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=3279, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:33:08,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:08,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 152 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 736 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-18 16:33:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 16:33:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 319. [2022-01-18 16:33:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.9088050314465408) internal successors, (607), 318 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 607 transitions. [2022-01-18 16:33:08,374 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 607 transitions. Word has length 27 [2022-01-18 16:33:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 607 transitions. [2022-01-18 16:33:08,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 607 transitions. [2022-01-18 16:33:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:08,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:08,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:08,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:08,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 16:33:08,591 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash 905606037, now seen corresponding path program 22 times [2022-01-18 16:33:08,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:08,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204258668] [2022-01-18 16:33:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:08,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:08,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204258668] [2022-01-18 16:33:08,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204258668] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738133116] [2022-01-18 16:33:08,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:33:08,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:08,883 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:08,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:33:08,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:33:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:09,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:09,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:09,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:09,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:09,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:09,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738133116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:09,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:09,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:33:09,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547078298] [2022-01-18 16:33:09,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:09,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:33:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:33:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:33:09,552 INFO L87 Difference]: Start difference. First operand 319 states and 607 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:11,097 INFO L93 Difference]: Finished difference Result 526 states and 970 transitions. [2022-01-18 16:33:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:33:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:11,099 INFO L225 Difference]: With dead ends: 526 [2022-01-18 16:33:11,099 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 16:33:11,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=945, Invalid=6195, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:33:11,100 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:11,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 281 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:33:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 16:33:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 361. [2022-01-18 16:33:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.9055555555555554) internal successors, (686), 360 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 686 transitions. [2022-01-18 16:33:11,111 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 686 transitions. Word has length 27 [2022-01-18 16:33:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:11,111 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 686 transitions. [2022-01-18 16:33:11,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 686 transitions. [2022-01-18 16:33:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:11,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:11,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:11,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:11,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:11,330 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1914099033, now seen corresponding path program 23 times [2022-01-18 16:33:11,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:11,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176306726] [2022-01-18 16:33:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:11,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:11,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176306726] [2022-01-18 16:33:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176306726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998225596] [2022-01-18 16:33:11,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:33:11,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:11,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:11,599 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:11,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:33:11,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:33:11,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:11,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:33:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:11,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:11,913 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 31 treesize of output 19 [2022-01-18 16:33:11,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:12,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:12,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:12,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 16:33:12,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:12,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:12,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-01-18 16:33:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:12,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998225596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:12,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:12,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:33:12,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511349709] [2022-01-18 16:33:12,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:12,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:33:12,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:33:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:33:12,690 INFO L87 Difference]: Start difference. First operand 361 states and 686 transitions. Second operand has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 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 16:33:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:17,109 INFO L93 Difference]: Finished difference Result 1170 states and 2096 transitions. [2022-01-18 16:33:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 16:33:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 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 27 [2022-01-18 16:33:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:17,112 INFO L225 Difference]: With dead ends: 1170 [2022-01-18 16:33:17,112 INFO L226 Difference]: Without dead ends: 1152 [2022-01-18 16:33:17,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3824, Invalid=17346, Unknown=0, NotChecked=0, Total=21170 [2022-01-18 16:33:17,114 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 380 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:17,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 412 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1415 Invalid, 0 Unknown, 507 Unchecked, 0.6s Time] [2022-01-18 16:33:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-01-18 16:33:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 638. [2022-01-18 16:33:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.8869701726844583) internal successors, (1202), 637 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1202 transitions. [2022-01-18 16:33:17,128 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1202 transitions. Word has length 27 [2022-01-18 16:33:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:17,128 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1202 transitions. [2022-01-18 16:33:17,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 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 16:33:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1202 transitions. [2022-01-18 16:33:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:17,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:17,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:17,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:17,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:17,343 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1498802539, now seen corresponding path program 24 times [2022-01-18 16:33:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194779760] [2022-01-18 16:33:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:17,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:17,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:17,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194779760] [2022-01-18 16:33:17,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194779760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:17,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962597106] [2022-01-18 16:33:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:33:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:17,612 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:17,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:33:17,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:33:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:33:17,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,083 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 35 treesize of output 27 [2022-01-18 16:33:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:18,132 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 31 treesize of output 17 [2022-01-18 16:33:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:18,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:18,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:18,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:18,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:18,917 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 66 treesize of output 86 [2022-01-18 16:33:19,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:19,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:19,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:19,628 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 73 treesize of output 83 [2022-01-18 16:33:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:19,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962597106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:19,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:19,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2022-01-18 16:33:19,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363703552] [2022-01-18 16:33:19,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:19,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:33:19,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:33:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:33:19,965 INFO L87 Difference]: Start difference. First operand 638 states and 1202 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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 16:33:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:21,978 INFO L93 Difference]: Finished difference Result 947 states and 1746 transitions. [2022-01-18 16:33:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:33:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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 27 [2022-01-18 16:33:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:21,981 INFO L225 Difference]: With dead ends: 947 [2022-01-18 16:33:21,981 INFO L226 Difference]: Without dead ends: 933 [2022-01-18 16:33:21,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=905, Invalid=6235, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:33:21,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:21,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 249 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 983 Invalid, 0 Unknown, 830 Unchecked, 0.4s Time] [2022-01-18 16:33:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-18 16:33:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 655. [2022-01-18 16:33:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.889908256880734) internal successors, (1236), 654 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1236 transitions. [2022-01-18 16:33:21,992 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1236 transitions. Word has length 27 [2022-01-18 16:33:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1236 transitions. [2022-01-18 16:33:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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 16:33:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1236 transitions. [2022-01-18 16:33:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:21,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:21,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:22,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 16:33:22,207 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1305157107, now seen corresponding path program 25 times [2022-01-18 16:33:22,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624401537] [2022-01-18 16:33:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:22,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:22,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:22,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624401537] [2022-01-18 16:33:22,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624401537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:22,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894526413] [2022-01-18 16:33:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:33:22,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:22,432 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:22,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:33:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:22,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:22,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:22,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:22,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:22,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:22,936 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 30 treesize of output 30 [2022-01-18 16:33:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:23,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894526413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:23,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:23,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:23,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972828968] [2022-01-18 16:33:23,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:23,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:23,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:23,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:23,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:23,031 INFO L87 Difference]: Start difference. First operand 655 states and 1236 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:24,342 INFO L93 Difference]: Finished difference Result 1480 states and 2705 transitions. [2022-01-18 16:33:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:33:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:24,346 INFO L225 Difference]: With dead ends: 1480 [2022-01-18 16:33:24,346 INFO L226 Difference]: Without dead ends: 1460 [2022-01-18 16:33:24,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=5523, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:33:24,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:24,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 177 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-01-18 16:33:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 653. [2022-01-18 16:33:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.8957055214723926) internal successors, (1236), 652 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1236 transitions. [2022-01-18 16:33:24,359 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1236 transitions. Word has length 27 [2022-01-18 16:33:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:24,359 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1236 transitions. [2022-01-18 16:33:24,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1236 transitions. [2022-01-18 16:33:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:24,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:24,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:24,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:24,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 16:33:24,577 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash -423091383, now seen corresponding path program 26 times [2022-01-18 16:33:24,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:24,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394670739] [2022-01-18 16:33:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:24,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:24,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:24,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394670739] [2022-01-18 16:33:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394670739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:24,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581150898] [2022-01-18 16:33:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:33:24,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:24,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:24,794 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:33:24,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:33:24,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:24,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:24,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:25,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:25,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:25,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:25,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:25,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581150898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:25,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:25,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:25,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948474850] [2022-01-18 16:33:25,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:25,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:25,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:25,378 INFO L87 Difference]: Start difference. First operand 653 states and 1236 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:26,430 INFO L93 Difference]: Finished difference Result 890 states and 1655 transitions. [2022-01-18 16:33:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:33:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:26,432 INFO L225 Difference]: With dead ends: 890 [2022-01-18 16:33:26,433 INFO L226 Difference]: Without dead ends: 867 [2022-01-18 16:33:26,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=4274, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:33:26,434 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 173 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:26,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 196 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-18 16:33:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 398. [2022-01-18 16:33:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.942065491183879) internal successors, (771), 397 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 771 transitions. [2022-01-18 16:33:26,441 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 771 transitions. Word has length 27 [2022-01-18 16:33:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:26,441 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 771 transitions. [2022-01-18 16:33:26,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 771 transitions. [2022-01-18 16:33:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:26,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:26,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:26,457 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 16:33:26,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 16:33:26,657 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash 376679803, now seen corresponding path program 27 times [2022-01-18 16:33:26,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:26,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087927331] [2022-01-18 16:33:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:26,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:26,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087927331] [2022-01-18 16:33:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087927331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614177336] [2022-01-18 16:33:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:33:26,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:26,871 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:33:26,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:33:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:26,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:27,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:27,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:27,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:27,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:27,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:27,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:27,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614177336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:27,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458156645] [2022-01-18 16:33:27,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:27,509 INFO L87 Difference]: Start difference. First operand 398 states and 771 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:29,201 INFO L93 Difference]: Finished difference Result 894 states and 1661 transitions. [2022-01-18 16:33:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:33:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:29,203 INFO L225 Difference]: With dead ends: 894 [2022-01-18 16:33:29,203 INFO L226 Difference]: Without dead ends: 881 [2022-01-18 16:33:29,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1052, Invalid=6958, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:33:29,205 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 181 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:29,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-18 16:33:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 554. [2022-01-18 16:33:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.9095840867992766) internal successors, (1056), 553 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1056 transitions. [2022-01-18 16:33:29,212 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1056 transitions. Word has length 27 [2022-01-18 16:33:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:29,212 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1056 transitions. [2022-01-18 16:33:29,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1056 transitions. [2022-01-18 16:33:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:29,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:29,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:29,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:29,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:29,423 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1258745527, now seen corresponding path program 28 times [2022-01-18 16:33:29,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132211247] [2022-01-18 16:33:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:29,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:29,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132211247] [2022-01-18 16:33:29,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132211247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467398306] [2022-01-18 16:33:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:33:29,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:29,615 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:29,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:33:29,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:33:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:29,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:29,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:29,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:29,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:29,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:30,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:30,087 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 30 treesize of output 30 [2022-01-18 16:33:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:30,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467398306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:30,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:30,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:30,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229245225] [2022-01-18 16:33:30,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:30,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:30,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:30,183 INFO L87 Difference]: Start difference. First operand 554 states and 1056 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:31,034 INFO L93 Difference]: Finished difference Result 666 states and 1254 transitions. [2022-01-18 16:33:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:33:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:31,036 INFO L225 Difference]: With dead ends: 666 [2022-01-18 16:33:31,036 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 16:33:31,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=539, Invalid=2883, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:33:31,036 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 214 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:31,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 177 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:33:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 16:33:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 411. [2022-01-18 16:33:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.9146341463414633) internal successors, (785), 410 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 785 transitions. [2022-01-18 16:33:31,042 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 785 transitions. Word has length 27 [2022-01-18 16:33:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:31,042 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 785 transitions. [2022-01-18 16:33:31,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 785 transitions. [2022-01-18 16:33:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:31,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:31,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:31,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:31,255 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash 379329915, now seen corresponding path program 29 times [2022-01-18 16:33:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747369610] [2022-01-18 16:33:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:31,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:31,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747369610] [2022-01-18 16:33:31,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747369610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176269181] [2022-01-18 16:33:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:33:31,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:31,456 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:33:31,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:33:31,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:31,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:31,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:33:31,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:31,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:31,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:31,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:32,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:32,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:33:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:32,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176269181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:32,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:32,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 16:33:32,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286524444] [2022-01-18 16:33:32,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:32,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:33:32,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:33:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:33:32,319 INFO L87 Difference]: Start difference. First operand 411 states and 785 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 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 16:33:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:35,424 INFO L93 Difference]: Finished difference Result 1310 states and 2390 transitions. [2022-01-18 16:33:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 16:33:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 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 27 [2022-01-18 16:33:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:35,428 INFO L225 Difference]: With dead ends: 1310 [2022-01-18 16:33:35,428 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 16:33:35,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4624 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1729, Invalid=12077, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 16:33:35,429 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 613 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:35,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 410 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1094 Invalid, 0 Unknown, 392 Unchecked, 0.5s Time] [2022-01-18 16:33:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 16:33:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 578. [2022-01-18 16:33:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.923743500866551) internal successors, (1110), 577 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1110 transitions. [2022-01-18 16:33:35,438 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1110 transitions. Word has length 27 [2022-01-18 16:33:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:35,438 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1110 transitions. [2022-01-18 16:33:35,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 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 16:33:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1110 transitions. [2022-01-18 16:33:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:35,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:35,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:35,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:35,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:35,654 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1261395639, now seen corresponding path program 30 times [2022-01-18 16:33:35,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:35,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456203472] [2022-01-18 16:33:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:35,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:35,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:35,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456203472] [2022-01-18 16:33:35,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456203472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:35,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573673370] [2022-01-18 16:33:35,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:33:35,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:35,838 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:35,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:33:35,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:33:35,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:35,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:35,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:36,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:36,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:36,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:36,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:36,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:36,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573673370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:36,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:36,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-01-18 16:33:36,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118307127] [2022-01-18 16:33:36,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:36,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:33:36,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:33:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:33:36,403 INFO L87 Difference]: Start difference. First operand 578 states and 1110 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:37,789 INFO L93 Difference]: Finished difference Result 1260 states and 2309 transitions. [2022-01-18 16:33:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:33:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:37,792 INFO L225 Difference]: With dead ends: 1260 [2022-01-18 16:33:37,792 INFO L226 Difference]: Without dead ends: 1244 [2022-01-18 16:33:37,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=874, Invalid=4826, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:33:37,793 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 163 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-01-18 16:33:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 678. [2022-01-18 16:33:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9039881831610044) internal successors, (1289), 677 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1289 transitions. [2022-01-18 16:33:37,803 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1289 transitions. Word has length 27 [2022-01-18 16:33:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:37,803 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1289 transitions. [2022-01-18 16:33:37,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1289 transitions. [2022-01-18 16:33:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:37,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:37,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:37,825 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 16:33:38,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 16:33:38,023 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1849140961, now seen corresponding path program 31 times [2022-01-18 16:33:38,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:38,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979147444] [2022-01-18 16:33:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:38,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:38,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979147444] [2022-01-18 16:33:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979147444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143044554] [2022-01-18 16:33:38,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:33:38,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:38,212 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:33:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:38,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:38,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:38,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:38,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:38,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:38,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:38,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:38,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143044554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:38,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-01-18 16:33:38,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606486320] [2022-01-18 16:33:38,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:38,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:33:38,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:33:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:33:38,765 INFO L87 Difference]: Start difference. First operand 678 states and 1289 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:39,827 INFO L93 Difference]: Finished difference Result 1306 states and 2388 transitions. [2022-01-18 16:33:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:33:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:39,831 INFO L225 Difference]: With dead ends: 1306 [2022-01-18 16:33:39,831 INFO L226 Difference]: Without dead ends: 1283 [2022-01-18 16:33:39,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=4277, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:33:39,832 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:39,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 133 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:33:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-01-18 16:33:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 680. [2022-01-18 16:33:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.905743740795287) internal successors, (1294), 679 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1294 transitions. [2022-01-18 16:33:39,842 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1294 transitions. Word has length 27 [2022-01-18 16:33:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1294 transitions. [2022-01-18 16:33:39,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1294 transitions. [2022-01-18 16:33:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:39,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:39,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:39,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:40,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:40,059 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -361622183, now seen corresponding path program 32 times [2022-01-18 16:33:40,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389664377] [2022-01-18 16:33:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:40,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389664377] [2022-01-18 16:33:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389664377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275455337] [2022-01-18 16:33:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:33:40,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:40,356 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:40,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:33:40,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:33:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:40,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:40,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:40,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:40,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:40,800 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 36 treesize of output 38 [2022-01-18 16:33:40,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:40,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:41,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275455337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:41,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-01-18 16:33:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632202646] [2022-01-18 16:33:41,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:33:41,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:33:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:33:41,021 INFO L87 Difference]: Start difference. First operand 680 states and 1294 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:41,956 INFO L93 Difference]: Finished difference Result 900 states and 1670 transitions. [2022-01-18 16:33:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:33:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:41,959 INFO L225 Difference]: With dead ends: 900 [2022-01-18 16:33:41,959 INFO L226 Difference]: Without dead ends: 889 [2022-01-18 16:33:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=688, Invalid=3602, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:33:41,960 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:41,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 132 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:33:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-18 16:33:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 685. [2022-01-18 16:33:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.909356725146199) internal successors, (1306), 684 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1306 transitions. [2022-01-18 16:33:41,970 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1306 transitions. Word has length 27 [2022-01-18 16:33:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:41,970 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 1306 transitions. [2022-01-18 16:33:41,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1306 transitions. [2022-01-18 16:33:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:41,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:41,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:41,986 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 16:33:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:42,184 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash 520443541, now seen corresponding path program 33 times [2022-01-18 16:33:42,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:42,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019143920] [2022-01-18 16:33:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:42,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:42,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:42,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019143920] [2022-01-18 16:33:42,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019143920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:42,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556509227] [2022-01-18 16:33:42,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:33:42,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:42,472 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:42,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:33:42,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:33:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:33:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:42,788 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:33:42,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2022-01-18 16:33:42,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:42,821 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 28 treesize of output 14 [2022-01-18 16:33:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:42,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:43,562 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:33:43,562 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 72 treesize of output 80 [2022-01-18 16:33:43,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:43,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:43,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:43,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:43,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 69 [2022-01-18 16:33:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556509227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:44,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:44,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2022-01-18 16:33:44,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930045314] [2022-01-18 16:33:44,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:44,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:33:44,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:33:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:33:44,066 INFO L87 Difference]: Start difference. First operand 685 states and 1306 transitions. Second operand has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:47,778 INFO L93 Difference]: Finished difference Result 1161 states and 2133 transitions. [2022-01-18 16:33:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:33:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:47,781 INFO L225 Difference]: With dead ends: 1161 [2022-01-18 16:33:47,781 INFO L226 Difference]: Without dead ends: 1134 [2022-01-18 16:33:47,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1382, Invalid=8718, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:33:47,782 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 434 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 511 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:47,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 355 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1466 Invalid, 0 Unknown, 511 Unchecked, 0.7s Time] [2022-01-18 16:33:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-01-18 16:33:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 722. [2022-01-18 16:33:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.9292649098474342) internal successors, (1391), 721 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1391 transitions. [2022-01-18 16:33:47,792 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1391 transitions. Word has length 27 [2022-01-18 16:33:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1391 transitions. [2022-01-18 16:33:47,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1391 transitions. [2022-01-18 16:33:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:47,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:47,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:47,819 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 16:33:48,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 16:33:48,008 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1663353153, now seen corresponding path program 34 times [2022-01-18 16:33:48,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:48,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256552853] [2022-01-18 16:33:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:48,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:48,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:48,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256552853] [2022-01-18 16:33:48,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256552853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:48,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519167594] [2022-01-18 16:33:48,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:33:48,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:48,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:48,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:48,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:33:48,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:33:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:48,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:48,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:48,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:48,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:48,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:48,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:49,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519167594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:49,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:49,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-01-18 16:33:49,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113659006] [2022-01-18 16:33:49,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:49,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:33:49,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:33:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:33:49,004 INFO L87 Difference]: Start difference. First operand 722 states and 1391 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:50,490 INFO L93 Difference]: Finished difference Result 1223 states and 2264 transitions. [2022-01-18 16:33:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:33:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:50,494 INFO L225 Difference]: With dead ends: 1223 [2022-01-18 16:33:50,494 INFO L226 Difference]: Without dead ends: 1210 [2022-01-18 16:33:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=838, Invalid=6134, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:33:50,495 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 143 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-01-18 16:33:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 722. [2022-01-18 16:33:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.926490984743412) internal successors, (1389), 721 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1389 transitions. [2022-01-18 16:33:50,504 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1389 transitions. Word has length 27 [2022-01-18 16:33:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1389 transitions. [2022-01-18 16:33:50,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1389 transitions. [2022-01-18 16:33:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:50,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:50,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:50,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:50,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 16:33:50,713 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1899041413, now seen corresponding path program 35 times [2022-01-18 16:33:50,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:50,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001516893] [2022-01-18 16:33:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:50,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:51,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:51,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001516893] [2022-01-18 16:33:51,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001516893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:51,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001082567] [2022-01-18 16:33:51,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:33:51,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:51,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:51,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:51,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:33:51,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:33:51,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 16:33:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:51,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:51,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:51,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:51,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:51,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:51,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:33:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:51,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001082567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:51,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:51,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-01-18 16:33:51,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960486037] [2022-01-18 16:33:51,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:51,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:33:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:33:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:33:51,671 INFO L87 Difference]: Start difference. First operand 722 states and 1389 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:53,098 INFO L93 Difference]: Finished difference Result 1211 states and 2258 transitions. [2022-01-18 16:33:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:33:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:53,102 INFO L225 Difference]: With dead ends: 1211 [2022-01-18 16:33:53,102 INFO L226 Difference]: Without dead ends: 1198 [2022-01-18 16:33:53,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=998, Invalid=5164, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:33:53,103 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:53,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 170 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-01-18 16:33:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 723. [2022-01-18 16:33:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.9265927977839334) internal successors, (1391), 722 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1391 transitions. [2022-01-18 16:33:53,115 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1391 transitions. Word has length 27 [2022-01-18 16:33:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1391 transitions. [2022-01-18 16:33:53,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1391 transitions. [2022-01-18 16:33:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:53,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:53,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:53,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:53,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 16:33:53,317 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1016975689, now seen corresponding path program 36 times [2022-01-18 16:33:53,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:53,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862076748] [2022-01-18 16:33:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:53,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:53,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:53,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862076748] [2022-01-18 16:33:53,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862076748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:53,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937245596] [2022-01-18 16:33:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:33:53,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:53,608 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:53,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:33:53,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:33:53,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:53,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:53,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:53,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:53,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:54,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:54,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:54,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:54,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:33:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:54,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937245596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:54,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:54,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-01-18 16:33:54,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591278932] [2022-01-18 16:33:54,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:54,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:33:54,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:33:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:33:54,280 INFO L87 Difference]: Start difference. First operand 723 states and 1391 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:55,292 INFO L93 Difference]: Finished difference Result 880 states and 1662 transitions. [2022-01-18 16:33:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:33:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:55,294 INFO L225 Difference]: With dead ends: 880 [2022-01-18 16:33:55,294 INFO L226 Difference]: Without dead ends: 870 [2022-01-18 16:33:55,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:33:55,295 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:55,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 144 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:33:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-18 16:33:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 718. [2022-01-18 16:33:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.9246861924686192) internal successors, (1380), 717 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1380 transitions. [2022-01-18 16:33:55,307 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1380 transitions. Word has length 27 [2022-01-18 16:33:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:55,307 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1380 transitions. [2022-01-18 16:33:55,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1380 transitions. [2022-01-18 16:33:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:55,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:55,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:55,325 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 16:33:55,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 16:33:55,520 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1380174579, now seen corresponding path program 37 times [2022-01-18 16:33:55,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:55,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156244605] [2022-01-18 16:33:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:55,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156244605] [2022-01-18 16:33:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156244605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516316133] [2022-01-18 16:33:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:33:55,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:55,709 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:55,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 16:33:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:55,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:55,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:55,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:56,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:56,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:56,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:56,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:56,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516316133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:56,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:56,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:56,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046482619] [2022-01-18 16:33:56,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:56,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:56,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:56,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:56,288 INFO L87 Difference]: Start difference. First operand 718 states and 1380 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:57,995 INFO L93 Difference]: Finished difference Result 1467 states and 2719 transitions. [2022-01-18 16:33:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:33:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:33:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:57,998 INFO L225 Difference]: With dead ends: 1467 [2022-01-18 16:33:57,998 INFO L226 Difference]: Without dead ends: 1451 [2022-01-18 16:33:57,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1052, Invalid=6958, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:33:57,999 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 264 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:57,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 162 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:33:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-01-18 16:33:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 978. [2022-01-18 16:33:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.8894575230296826) internal successors, (1846), 977 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1846 transitions. [2022-01-18 16:33:58,012 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1846 transitions. Word has length 27 [2022-01-18 16:33:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1846 transitions. [2022-01-18 16:33:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1846 transitions. [2022-01-18 16:33:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:33:58,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:58,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:58,028 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 16:33:58,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 16:33:58,214 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:33:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1967919901, now seen corresponding path program 38 times [2022-01-18 16:33:58,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:58,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319034542] [2022-01-18 16:33:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:58,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:58,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:58,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319034542] [2022-01-18 16:33:58,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319034542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:58,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95057808] [2022-01-18 16:33:58,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:33:58,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:58,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:58,399 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:33:58,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 16:33:58,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:33:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:33:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:58,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:33:58,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:33:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:58,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:58,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:58,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:33:58,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:58,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:33:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95057808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:59,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:59,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:33:59,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974073917] [2022-01-18 16:33:59,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:33:59,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:33:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:33:59,022 INFO L87 Difference]: Start difference. First operand 978 states and 1846 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:00,314 INFO L93 Difference]: Finished difference Result 1926 states and 3499 transitions. [2022-01-18 16:34:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:34:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:34:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:00,318 INFO L225 Difference]: With dead ends: 1926 [2022-01-18 16:34:00,318 INFO L226 Difference]: Without dead ends: 1903 [2022-01-18 16:34:00,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=5523, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:34:00,318 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:00,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 145 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-01-18 16:34:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 978. [2022-01-18 16:34:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.8904810644831116) internal successors, (1847), 977 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1847 transitions. [2022-01-18 16:34:00,331 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1847 transitions. Word has length 27 [2022-01-18 16:34:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:00,331 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1847 transitions. [2022-01-18 16:34:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1847 transitions. [2022-01-18 16:34:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:34:00,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:00,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:00,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 16:34:00,533 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash -242843243, now seen corresponding path program 39 times [2022-01-18 16:34:00,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:00,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133021362] [2022-01-18 16:34:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:00,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:00,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133021362] [2022-01-18 16:34:00,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133021362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558492526] [2022-01-18 16:34:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:34:00,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:00,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:00,856 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:00,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 16:34:00,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:34:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:34:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:01,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:01,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:01,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:01,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:01,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:01,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:01,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:34:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558492526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:01,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:34:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876004246] [2022-01-18 16:34:01,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:34:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:34:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:34:01,544 INFO L87 Difference]: Start difference. First operand 978 states and 1847 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:02,926 INFO L93 Difference]: Finished difference Result 1472 states and 2739 transitions. [2022-01-18 16:34:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:34:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:34:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:02,928 INFO L225 Difference]: With dead ends: 1472 [2022-01-18 16:34:02,928 INFO L226 Difference]: Without dead ends: 1461 [2022-01-18 16:34:02,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=5742, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:34:02,929 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:02,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 159 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-01-18 16:34:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 986. [2022-01-18 16:34:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.8944162436548224) internal successors, (1866), 985 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1866 transitions. [2022-01-18 16:34:02,941 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1866 transitions. Word has length 27 [2022-01-18 16:34:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:02,941 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1866 transitions. [2022-01-18 16:34:02,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1866 transitions. [2022-01-18 16:34:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:34:02,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:02,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:02,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:03,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 16:34:03,142 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:03,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:03,143 INFO L85 PathProgramCache]: Analyzing trace with hash 639222481, now seen corresponding path program 40 times [2022-01-18 16:34:03,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:03,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987261685] [2022-01-18 16:34:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:03,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:03,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987261685] [2022-01-18 16:34:03,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987261685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304106545] [2022-01-18 16:34:03,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:34:03,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:03,415 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:03,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 16:34:03,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:34:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:03,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:34:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:03,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:03,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:03,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:03,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:03,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:04,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:04,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:34:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304106545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:04,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:04,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:34:04,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489790983] [2022-01-18 16:34:04,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:04,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:34:04,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:34:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:34:04,125 INFO L87 Difference]: Start difference. First operand 986 states and 1866 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:05,779 INFO L93 Difference]: Finished difference Result 2214 states and 4036 transitions. [2022-01-18 16:34:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:34:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:34:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:05,783 INFO L225 Difference]: With dead ends: 2214 [2022-01-18 16:34:05,783 INFO L226 Difference]: Without dead ends: 2191 [2022-01-18 16:34:05,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1019, Invalid=7537, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:34:05,784 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 202 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:05,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 121 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2022-01-18 16:34:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 984. [2022-01-18 16:34:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.8931841302136316) internal successors, (1861), 983 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1861 transitions. [2022-01-18 16:34:05,805 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1861 transitions. Word has length 27 [2022-01-18 16:34:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1861 transitions. [2022-01-18 16:34:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1861 transitions. [2022-01-18 16:34:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:34:05,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:05,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:05,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:06,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 16:34:06,007 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262473, now seen corresponding path program 41 times [2022-01-18 16:34:06,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:06,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532217060] [2022-01-18 16:34:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:06,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:06,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532217060] [2022-01-18 16:34:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532217060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023210908] [2022-01-18 16:34:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:34:06,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:06,317 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:06,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 16:34:06,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:34:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:34:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:06,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:06,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-01-18 16:34:06,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:06,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:34:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:07,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:07,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-18 16:34:07,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:07,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:07,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:07,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-01-18 16:34:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:07,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:07,401 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:34:07,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2022-01-18 16:34:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:07,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023210908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:07,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:07,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-01-18 16:34:07,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574393892] [2022-01-18 16:34:07,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:07,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 16:34:07,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 16:34:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:34:07,536 INFO L87 Difference]: Start difference. First operand 984 states and 1861 transitions. Second operand has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:11,481 INFO L93 Difference]: Finished difference Result 2053 states and 3739 transitions. [2022-01-18 16:34:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 16:34:11,482 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 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 27 [2022-01-18 16:34:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:11,485 INFO L225 Difference]: With dead ends: 2053 [2022-01-18 16:34:11,485 INFO L226 Difference]: Without dead ends: 2037 [2022-01-18 16:34:11,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2583, Invalid=12917, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 16:34:11,486 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:11,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 247 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1404 Invalid, 0 Unknown, 884 Unchecked, 0.6s Time] [2022-01-18 16:34:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2022-01-18 16:34:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1209. [2022-01-18 16:34:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 1.8948675496688743) internal successors, (2289), 1208 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2289 transitions. [2022-01-18 16:34:11,501 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2289 transitions. Word has length 27 [2022-01-18 16:34:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2289 transitions. [2022-01-18 16:34:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2289 transitions. [2022-01-18 16:34:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:34:11,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:11,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:11,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:11,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:11,708 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -898196749, now seen corresponding path program 42 times [2022-01-18 16:34:11,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685169924] [2022-01-18 16:34:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:11,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:11,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685169924] [2022-01-18 16:34:11,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685169924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499043997] [2022-01-18 16:34:11,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:34:11,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:11,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:12,000 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:12,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 16:34:12,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:34:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:34:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:12,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:12,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:12,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:12,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:12,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:12,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:12,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:34:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:12,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499043997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:12,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:12,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-18 16:34:12,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781614692] [2022-01-18 16:34:12,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:12,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:34:12,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:34:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:34:12,803 INFO L87 Difference]: Start difference. First operand 1209 states and 2289 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:14,465 INFO L93 Difference]: Finished difference Result 1657 states and 3072 transitions. [2022-01-18 16:34:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:34:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 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 27 [2022-01-18 16:34:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:14,467 INFO L225 Difference]: With dead ends: 1657 [2022-01-18 16:34:14,467 INFO L226 Difference]: Without dead ends: 1647 [2022-01-18 16:34:14,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1238, Invalid=6952, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:34:14,468 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 227 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:14,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 147 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-01-18 16:34:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1212. [2022-01-18 16:34:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.8976052848885219) internal successors, (2298), 1211 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2298 transitions. [2022-01-18 16:34:14,488 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2298 transitions. Word has length 27 [2022-01-18 16:34:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:14,488 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2298 transitions. [2022-01-18 16:34:14,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2298 transitions. [2022-01-18 16:34:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:34:14,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:14,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:14,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:14,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:14,704 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -290857477, now seen corresponding path program 43 times [2022-01-18 16:34:14,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636570245] [2022-01-18 16:34:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:14,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:14,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636570245] [2022-01-18 16:34:14,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636570245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826284695] [2022-01-18 16:34:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:34:14,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:14,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:14,996 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:14,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 16:34:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 16:34:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:15,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:15,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:15,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:15,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:15,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:15,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:34:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826284695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 16:34:15,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67076769] [2022-01-18 16:34:15,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:34:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:34:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:34:15,681 INFO L87 Difference]: Start difference. First operand 1212 states and 2298 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:17,554 INFO L93 Difference]: Finished difference Result 1977 states and 3673 transitions. [2022-01-18 16:34:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:34:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:34:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:17,556 INFO L225 Difference]: With dead ends: 1977 [2022-01-18 16:34:17,556 INFO L226 Difference]: Without dead ends: 1964 [2022-01-18 16:34:17,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1038, Invalid=7518, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:34:17,557 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 172 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:17,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 130 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-18 16:34:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1211. [2022-01-18 16:34:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.8933884297520662) internal successors, (2291), 1210 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2291 transitions. [2022-01-18 16:34:17,571 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2291 transitions. Word has length 27 [2022-01-18 16:34:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:17,571 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 2291 transitions. [2022-01-18 16:34:17,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2291 transitions. [2022-01-18 16:34:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:34:17,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:17,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:17,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:17,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 16:34:17,787 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 459995390, now seen corresponding path program 44 times [2022-01-18 16:34:17,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:17,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868997126] [2022-01-18 16:34:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:17,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:17,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868997126] [2022-01-18 16:34:17,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868997126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031799818] [2022-01-18 16:34:17,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:34:17,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:17,806 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:17,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 16:34:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:34:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:34:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:17,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031799818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:17,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:17,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:34:17,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692199173] [2022-01-18 16:34:17,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:34:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:17,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:34:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:34:17,899 INFO L87 Difference]: Start difference. First operand 1211 states and 2291 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:17,920 INFO L93 Difference]: Finished difference Result 1357 states and 2559 transitions. [2022-01-18 16:34:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:34:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:34:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:17,922 INFO L225 Difference]: With dead ends: 1357 [2022-01-18 16:34:17,922 INFO L226 Difference]: Without dead ends: 1342 [2022-01-18 16:34:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:34:17,923 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:17,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 46 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:34:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-01-18 16:34:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 730. [2022-01-18 16:34:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.9423868312757202) internal successors, (1416), 729 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1416 transitions. [2022-01-18 16:34:17,932 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1416 transitions. Word has length 31 [2022-01-18 16:34:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1416 transitions. [2022-01-18 16:34:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1416 transitions. [2022-01-18 16:34:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:34:17,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:17,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:17,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:18,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 16:34:18,149 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1144638270, now seen corresponding path program 45 times [2022-01-18 16:34:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:18,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230091963] [2022-01-18 16:34:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:18,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:18,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230091963] [2022-01-18 16:34:18,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230091963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927498631] [2022-01-18 16:34:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:34:18,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:18,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:18,171 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:18,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:34:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:18,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 16:34:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:34:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:18,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:18,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927498631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:18,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:18,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:34:18,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951045537] [2022-01-18 16:34:18,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:18,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:34:18,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:34:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:34:18,294 INFO L87 Difference]: Start difference. First operand 730 states and 1416 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:18,307 INFO L93 Difference]: Finished difference Result 591 states and 1059 transitions. [2022-01-18 16:34:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:34:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:34:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:18,308 INFO L225 Difference]: With dead ends: 591 [2022-01-18 16:34:18,308 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 16:34:18,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:34:18,309 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:18,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:34:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 16:34:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 499. [2022-01-18 16:34:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.7730923694779117) internal successors, (883), 498 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 883 transitions. [2022-01-18 16:34:18,314 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 883 transitions. Word has length 31 [2022-01-18 16:34:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:18,314 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 883 transitions. [2022-01-18 16:34:18,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 883 transitions. [2022-01-18 16:34:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:18,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:18,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:18,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:18,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 16:34:18,523 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1436163393, now seen corresponding path program 46 times [2022-01-18 16:34:18,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:18,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112026203] [2022-01-18 16:34:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:18,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:18,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112026203] [2022-01-18 16:34:18,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112026203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:18,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638316104] [2022-01-18 16:34:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:34:18,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:18,780 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:18,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 16:34:18,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:34:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:34:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:18,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-18 16:34:18,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:19,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:19,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:19,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:19,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:19,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:34:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:19,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638316104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:19,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:19,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:34:19,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671852409] [2022-01-18 16:34:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:19,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:34:19,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:34:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:34:19,461 INFO L87 Difference]: Start difference. First operand 499 states and 883 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:20,264 INFO L93 Difference]: Finished difference Result 566 states and 986 transitions. [2022-01-18 16:34:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:34:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:20,265 INFO L225 Difference]: With dead ends: 566 [2022-01-18 16:34:20,265 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 16:34:20,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:34:20,266 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:20,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 148 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:34:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 16:34:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 491. [2022-01-18 16:34:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7653061224489797) internal successors, (865), 490 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 865 transitions. [2022-01-18 16:34:20,271 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 865 transitions. Word has length 35 [2022-01-18 16:34:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:20,271 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 865 transitions. [2022-01-18 16:34:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 865 transitions. [2022-01-18 16:34:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:20,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:20,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:20,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 16:34:20,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:20,487 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -842207935, now seen corresponding path program 47 times [2022-01-18 16:34:20,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170601750] [2022-01-18 16:34:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:34:20,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:20,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170601750] [2022-01-18 16:34:20,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170601750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:20,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919743136] [2022-01-18 16:34:20,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:34:20,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:20,758 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:20,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 16:34:20,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:34:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 16:34:20,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:21,334 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:34:21,334 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 65 treesize of output 45 [2022-01-18 16:34:21,396 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:34:21,396 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 44 treesize of output 22 [2022-01-18 16:34:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:21,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:22,512 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:34:22,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 164 [2022-01-18 16:34:24,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:24,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:24,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 174 [2022-01-18 16:34:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:25,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919743136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:25,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:25,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 58 [2022-01-18 16:34:25,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459974493] [2022-01-18 16:34:25,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:25,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:34:25,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:25,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:34:25,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3161, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:34:25,247 INFO L87 Difference]: Start difference. First operand 491 states and 865 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:33,660 INFO L93 Difference]: Finished difference Result 1027 states and 1760 transitions. [2022-01-18 16:34:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-18 16:34:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:33,662 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 16:34:33,662 INFO L226 Difference]: Without dead ends: 1009 [2022-01-18 16:34:33,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11601 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3471, Invalid=29109, Unknown=0, NotChecked=0, Total=32580 [2022-01-18 16:34:33,665 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 305 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:33,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 181 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:34:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-18 16:34:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 328. [2022-01-18 16:34:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.7400611620795108) internal successors, (569), 327 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 569 transitions. [2022-01-18 16:34:33,670 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 569 transitions. Word has length 35 [2022-01-18 16:34:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 569 transitions. [2022-01-18 16:34:33,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 569 transitions. [2022-01-18 16:34:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:33,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:33,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:33,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:33,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 16:34:33,888 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1681102881, now seen corresponding path program 48 times [2022-01-18 16:34:33,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:33,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416866144] [2022-01-18 16:34:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:33,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:34,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416866144] [2022-01-18 16:34:34,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416866144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786306855] [2022-01-18 16:34:34,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:34:34,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:34,112 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:34,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 16:34:34,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:34:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 16:34:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:34,783 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:34:34,783 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 61 treesize of output 41 [2022-01-18 16:34:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:35,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:35,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2022-01-18 16:34:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:35,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:37,122 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:34:37,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 148 [2022-01-18 16:34:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:39,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:39,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 144 treesize of output 168 [2022-01-18 16:34:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:42,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786306855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:42,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:42,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 55 [2022-01-18 16:34:42,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970022430] [2022-01-18 16:34:42,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-18 16:34:42,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-18 16:34:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:34:42,695 INFO L87 Difference]: Start difference. First operand 328 states and 569 transitions. Second operand has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:45,751 INFO L93 Difference]: Finished difference Result 526 states and 891 transitions. [2022-01-18 16:34:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:34:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:45,752 INFO L225 Difference]: With dead ends: 526 [2022-01-18 16:34:45,752 INFO L226 Difference]: Without dead ends: 507 [2022-01-18 16:34:45,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=935, Invalid=8965, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:34:45,753 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:45,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 301 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1258 Invalid, 0 Unknown, 1178 Unchecked, 0.5s Time] [2022-01-18 16:34:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-18 16:34:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 369. [2022-01-18 16:34:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.7309782608695652) internal successors, (637), 368 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 637 transitions. [2022-01-18 16:34:45,756 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 637 transitions. Word has length 35 [2022-01-18 16:34:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 637 transitions. [2022-01-18 16:34:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 637 transitions. [2022-01-18 16:34:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:45,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:45,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:45,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:45,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:45,980 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1945050433, now seen corresponding path program 49 times [2022-01-18 16:34:45,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477104367] [2022-01-18 16:34:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:45,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:46,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477104367] [2022-01-18 16:34:46,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477104367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783430729] [2022-01-18 16:34:46,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:34:46,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:46,310 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:46,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 16:34:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:34:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:46,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:46,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:46,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:46,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:46,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:46,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:46,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:34:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783430729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:47,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:47,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:34:47,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665964966] [2022-01-18 16:34:47,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:47,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:34:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:34:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:34:47,024 INFO L87 Difference]: Start difference. First operand 369 states and 637 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:48,199 INFO L93 Difference]: Finished difference Result 512 states and 870 transitions. [2022-01-18 16:34:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:34:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:48,200 INFO L225 Difference]: With dead ends: 512 [2022-01-18 16:34:48,200 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 16:34:48,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=643, Invalid=3913, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:34:48,200 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:48,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 153 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:34:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 16:34:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 413. [2022-01-18 16:34:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.7572815533980584) internal successors, (724), 412 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 724 transitions. [2022-01-18 16:34:48,204 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 724 transitions. Word has length 35 [2022-01-18 16:34:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 724 transitions. [2022-01-18 16:34:48,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 724 transitions. [2022-01-18 16:34:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:48,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:48,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:48,220 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 16:34:48,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 16:34:48,405 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1467851139, now seen corresponding path program 50 times [2022-01-18 16:34:48,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008796948] [2022-01-18 16:34:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:48,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:48,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:48,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008796948] [2022-01-18 16:34:48,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008796948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:48,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638759563] [2022-01-18 16:34:48,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:34:48,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:48,640 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:48,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 16:34:48,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:34:48,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:34:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:48,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:48,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:48,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:49,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:49,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:49,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:49,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 28 [2022-01-18 16:34:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:49,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638759563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:49,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:49,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:34:49,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950229466] [2022-01-18 16:34:49,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:49,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:34:49,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:34:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:34:49,309 INFO L87 Difference]: Start difference. First operand 413 states and 724 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:51,165 INFO L93 Difference]: Finished difference Result 639 states and 1074 transitions. [2022-01-18 16:34:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:34:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:51,166 INFO L225 Difference]: With dead ends: 639 [2022-01-18 16:34:51,166 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 16:34:51,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=998, Invalid=7012, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:34:51,167 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 205 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:51,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 220 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:34:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 16:34:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 448. [2022-01-18 16:34:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.7539149888143177) internal successors, (784), 447 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 784 transitions. [2022-01-18 16:34:51,171 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 784 transitions. Word has length 35 [2022-01-18 16:34:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:51,172 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 784 transitions. [2022-01-18 16:34:51,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 784 transitions. [2022-01-18 16:34:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:51,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:51,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:51,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:51,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 16:34:51,387 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash -880105817, now seen corresponding path program 51 times [2022-01-18 16:34:51,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:51,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644212959] [2022-01-18 16:34:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:51,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:51,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644212959] [2022-01-18 16:34:51,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644212959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627447312] [2022-01-18 16:34:51,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:34:51,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:51,625 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:51,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 16:34:51,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:34:51,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:34:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:51,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:51,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:52,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:52,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:52,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:52,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:34:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:52,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627447312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:52,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:52,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:34:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911674427] [2022-01-18 16:34:52,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:52,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:34:52,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:34:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:34:52,301 INFO L87 Difference]: Start difference. First operand 448 states and 784 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:53,527 INFO L93 Difference]: Finished difference Result 974 states and 1619 transitions. [2022-01-18 16:34:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:34:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:53,528 INFO L225 Difference]: With dead ends: 974 [2022-01-18 16:34:53,528 INFO L226 Difference]: Without dead ends: 951 [2022-01-18 16:34:53,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=668, Invalid=4588, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:34:53,529 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:53,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 158 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:34:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-18 16:34:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 471. [2022-01-18 16:34:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.7468085106382978) internal successors, (821), 470 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 821 transitions. [2022-01-18 16:34:53,535 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 821 transitions. Word has length 35 [2022-01-18 16:34:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:53,535 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 821 transitions. [2022-01-18 16:34:53,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 821 transitions. [2022-01-18 16:34:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:53,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:53,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:53,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:53,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:53,736 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -581506077, now seen corresponding path program 52 times [2022-01-18 16:34:53,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622892155] [2022-01-18 16:34:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:53,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:54,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:54,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622892155] [2022-01-18 16:34:54,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622892155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:54,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095464132] [2022-01-18 16:34:54,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:34:54,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:54,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:54,003 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:54,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 16:34:54,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:34:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:34:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:54,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:54,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:54,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:54,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:54,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:54,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:54,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:34:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095464132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:54,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:54,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:34:54,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223161520] [2022-01-18 16:34:54,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:54,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:34:54,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:34:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:34:54,731 INFO L87 Difference]: Start difference. First operand 471 states and 821 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:55,671 INFO L93 Difference]: Finished difference Result 1003 states and 1698 transitions. [2022-01-18 16:34:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:34:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:55,673 INFO L225 Difference]: With dead ends: 1003 [2022-01-18 16:34:55,673 INFO L226 Difference]: Without dead ends: 990 [2022-01-18 16:34:55,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:34:55,673 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:55,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 144 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:34:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-18 16:34:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 500. [2022-01-18 16:34:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.749498997995992) internal successors, (873), 499 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 873 transitions. [2022-01-18 16:34:55,679 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 873 transitions. Word has length 35 [2022-01-18 16:34:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:55,679 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 873 transitions. [2022-01-18 16:34:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 873 transitions. [2022-01-18 16:34:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:55,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:55,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:55,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:55,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 16:34:55,895 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1832286487, now seen corresponding path program 53 times [2022-01-18 16:34:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:55,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588315196] [2022-01-18 16:34:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:55,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:56,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588315196] [2022-01-18 16:34:56,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588315196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:56,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998835473] [2022-01-18 16:34:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:34:56,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:56,163 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:34:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 16:34:56,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:34:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:34:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:56,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:34:56,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:34:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:56,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:56,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:56,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:56,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:56,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:34:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:34:57,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998835473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:57,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:57,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-01-18 16:34:57,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132508223] [2022-01-18 16:34:57,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:57,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:34:57,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:34:57,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:34:57,107 INFO L87 Difference]: Start difference. First operand 500 states and 873 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:59,749 INFO L93 Difference]: Finished difference Result 1146 states and 1939 transitions. [2022-01-18 16:34:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:34:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:34:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:59,751 INFO L225 Difference]: With dead ends: 1146 [2022-01-18 16:34:59,751 INFO L226 Difference]: Without dead ends: 1130 [2022-01-18 16:34:59,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4041 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2069, Invalid=10587, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:34:59,755 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:59,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 244 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:34:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-18 16:34:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 493. [2022-01-18 16:34:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.75) internal successors, (861), 492 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 861 transitions. [2022-01-18 16:34:59,768 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 861 transitions. Word has length 35 [2022-01-18 16:34:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:59,768 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 861 transitions. [2022-01-18 16:34:59,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 861 transitions. [2022-01-18 16:34:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:34:59,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:59,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:59,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 16:34:59,984 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:34:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1717702913, now seen corresponding path program 54 times [2022-01-18 16:34:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729360812] [2022-01-18 16:34:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:59,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:00,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729360812] [2022-01-18 16:35:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729360812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628966357] [2022-01-18 16:35:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:35:00,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:00,240 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:00,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:35:00,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:35:00,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:35:00,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:00,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:00,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:00,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:00,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:00,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:01,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:01,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:35:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:01,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628966357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:01,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:01,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:35:01,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975860126] [2022-01-18 16:35:01,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:01,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:35:01,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:35:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:35:01,315 INFO L87 Difference]: Start difference. First operand 493 states and 861 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:02,505 INFO L93 Difference]: Finished difference Result 769 states and 1325 transitions. [2022-01-18 16:35:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:35:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:02,506 INFO L225 Difference]: With dead ends: 769 [2022-01-18 16:35:02,506 INFO L226 Difference]: Without dead ends: 758 [2022-01-18 16:35:02,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:35:02,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 366 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:02,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 183 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 805 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-01-18 16:35:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-01-18 16:35:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 491. [2022-01-18 16:35:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7469387755102042) internal successors, (856), 490 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 856 transitions. [2022-01-18 16:35:02,512 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 856 transitions. Word has length 35 [2022-01-18 16:35:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 856 transitions. [2022-01-18 16:35:02,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 856 transitions. [2022-01-18 16:35:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:02,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:02,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:02,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:02,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:02,713 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1695198659, now seen corresponding path program 55 times [2022-01-18 16:35:02,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056837876] [2022-01-18 16:35:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:02,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:02,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056837876] [2022-01-18 16:35:02,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056837876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679284956] [2022-01-18 16:35:02,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:35:02,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:02,981 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:02,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:35:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:03,170 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 13 treesize of output 9 [2022-01-18 16:35:03,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:03,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:03,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:03,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:03,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:03,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:35:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679284956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:03,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:03,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:03,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671024533] [2022-01-18 16:35:03,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:03,685 INFO L87 Difference]: Start difference. First operand 491 states and 856 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:05,097 INFO L93 Difference]: Finished difference Result 811 states and 1394 transitions. [2022-01-18 16:35:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:35:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:05,103 INFO L225 Difference]: With dead ends: 811 [2022-01-18 16:35:05,103 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 16:35:05,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=730, Invalid=4526, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:35:05,104 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:05,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 150 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:35:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 16:35:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 492. [2022-01-18 16:35:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.7474541751527495) internal successors, (858), 491 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 858 transitions. [2022-01-18 16:35:05,109 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 858 transitions. Word has length 35 [2022-01-18 16:35:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:05,109 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 858 transitions. [2022-01-18 16:35:05,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 858 transitions. [2022-01-18 16:35:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:05,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:05,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:05,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:05,314 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1107453337, now seen corresponding path program 56 times [2022-01-18 16:35:05,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:05,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882859484] [2022-01-18 16:35:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:05,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:05,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882859484] [2022-01-18 16:35:05,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882859484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028487391] [2022-01-18 16:35:05,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:35:05,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:05,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:05,565 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:05,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:35:05,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:35:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:05,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:05,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:05,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:05,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:05,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:06,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:06,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:35:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:06,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028487391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:06,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:06,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:06,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511512991] [2022-01-18 16:35:06,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:06,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:06,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:06,259 INFO L87 Difference]: Start difference. First operand 492 states and 858 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:07,605 INFO L93 Difference]: Finished difference Result 925 states and 1558 transitions. [2022-01-18 16:35:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:35:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:07,606 INFO L225 Difference]: With dead ends: 925 [2022-01-18 16:35:07,606 INFO L226 Difference]: Without dead ends: 902 [2022-01-18 16:35:07,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=704, Invalid=4996, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:35:07,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:07,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 148 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:35:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-18 16:35:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 491. [2022-01-18 16:35:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7469387755102042) internal successors, (856), 490 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 856 transitions. [2022-01-18 16:35:07,612 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 856 transitions. Word has length 35 [2022-01-18 16:35:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:07,612 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 856 transitions. [2022-01-18 16:35:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 856 transitions. [2022-01-18 16:35:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:07,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:07,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:07,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:07,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:07,814 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 976750815, now seen corresponding path program 57 times [2022-01-18 16:35:07,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57031593] [2022-01-18 16:35:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:07,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:08,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57031593] [2022-01-18 16:35:08,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57031593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024762911] [2022-01-18 16:35:08,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:35:08,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:08,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:08,070 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:08,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:35:08,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:35:08,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:35:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:08,316 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 11 treesize of output 7 [2022-01-18 16:35:08,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:08,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:08,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:08,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:08,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:08,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:35:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:09,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024762911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:09,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:09,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:35:09,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187731513] [2022-01-18 16:35:09,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:09,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:35:09,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:35:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:35:09,119 INFO L87 Difference]: Start difference. First operand 491 states and 856 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:10,004 INFO L93 Difference]: Finished difference Result 867 states and 1479 transitions. [2022-01-18 16:35:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:35:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:10,005 INFO L225 Difference]: With dead ends: 867 [2022-01-18 16:35:10,005 INFO L226 Difference]: Without dead ends: 856 [2022-01-18 16:35:10,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=692, Invalid=4000, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:35:10,005 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 199 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:10,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 244 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 822 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-01-18 16:35:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-18 16:35:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 640. [2022-01-18 16:35:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.727699530516432) internal successors, (1104), 639 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1104 transitions. [2022-01-18 16:35:10,011 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1104 transitions. Word has length 35 [2022-01-18 16:35:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1104 transitions. [2022-01-18 16:35:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1104 transitions. [2022-01-18 16:35:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:10,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:10,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:10,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:10,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 16:35:10,213 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1858816539, now seen corresponding path program 58 times [2022-01-18 16:35:10,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428166611] [2022-01-18 16:35:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:10,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:10,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428166611] [2022-01-18 16:35:10,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428166611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795948103] [2022-01-18 16:35:10,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:35:10,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:10,477 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:10,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:35:10,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:35:10,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:10,652 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 13 treesize of output 9 [2022-01-18 16:35:10,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:10,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:10,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:10,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:11,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:11,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:35:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795948103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:11,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:11,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:11,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033470533] [2022-01-18 16:35:11,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:11,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:11,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:11,172 INFO L87 Difference]: Start difference. First operand 640 states and 1104 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:12,606 INFO L93 Difference]: Finished difference Result 1379 states and 2294 transitions. [2022-01-18 16:35:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:35:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:12,608 INFO L225 Difference]: With dead ends: 1379 [2022-01-18 16:35:12,608 INFO L226 Difference]: Without dead ends: 1353 [2022-01-18 16:35:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=792, Invalid=5688, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:35:12,609 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 211 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:12,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 186 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:35:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2022-01-18 16:35:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 659. [2022-01-18 16:35:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.7279635258358663) internal successors, (1137), 658 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1137 transitions. [2022-01-18 16:35:12,617 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1137 transitions. Word has length 35 [2022-01-18 16:35:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:12,617 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1137 transitions. [2022-01-18 16:35:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1137 transitions. [2022-01-18 16:35:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:12,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:12,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:12,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:12,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 16:35:12,834 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash -560668415, now seen corresponding path program 59 times [2022-01-18 16:35:12,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:12,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73798161] [2022-01-18 16:35:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:12,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:13,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73798161] [2022-01-18 16:35:13,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73798161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86240690] [2022-01-18 16:35:13,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:35:13,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:13,079 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:13,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:35:13,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:35:13,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:13,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:35:13,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:13,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:13,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:13,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:13,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:13,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:13,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:13,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:13,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:35:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:14,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86240690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:14,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:14,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:35:14,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532965011] [2022-01-18 16:35:14,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:14,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:35:14,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:35:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:35:14,186 INFO L87 Difference]: Start difference. First operand 659 states and 1137 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:19,722 INFO L93 Difference]: Finished difference Result 1981 states and 3246 transitions. [2022-01-18 16:35:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-18 16:35:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:19,724 INFO L225 Difference]: With dead ends: 1981 [2022-01-18 16:35:19,724 INFO L226 Difference]: Without dead ends: 1961 [2022-01-18 16:35:19,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 69 SyntacticMatches, 20 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12901 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4607, Invalid=29803, Unknown=0, NotChecked=0, Total=34410 [2022-01-18 16:35:19,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:19,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 504 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 1378 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2022-01-18 16:35:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-01-18 16:35:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 914. [2022-01-18 16:35:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 1.7207009857612268) internal successors, (1571), 913 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1571 transitions. [2022-01-18 16:35:19,738 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1571 transitions. Word has length 35 [2022-01-18 16:35:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1571 transitions. [2022-01-18 16:35:19,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1571 transitions. [2022-01-18 16:35:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:19,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:19,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:19,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:19,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 16:35:19,955 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 321397309, now seen corresponding path program 60 times [2022-01-18 16:35:19,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:19,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371958014] [2022-01-18 16:35:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:19,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:20,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371958014] [2022-01-18 16:35:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371958014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930436587] [2022-01-18 16:35:20,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:35:20,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:20,192 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:35:20,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:35:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:35:20,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:20,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:20,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:20,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:20,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:20,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-18 16:35:20,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:20,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:35:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:21,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930436587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:21,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:21,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-01-18 16:35:21,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974458090] [2022-01-18 16:35:21,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:21,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:35:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:35:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:35:21,263 INFO L87 Difference]: Start difference. First operand 914 states and 1571 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:25,975 INFO L93 Difference]: Finished difference Result 2818 states and 4701 transitions. [2022-01-18 16:35:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 16:35:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:25,979 INFO L225 Difference]: With dead ends: 2818 [2022-01-18 16:35:25,979 INFO L226 Difference]: Without dead ends: 2798 [2022-01-18 16:35:25,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 64 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10391 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3853, Invalid=23207, Unknown=0, NotChecked=0, Total=27060 [2022-01-18 16:35:25,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 564 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:25,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 645 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1440 Invalid, 0 Unknown, 1027 Unchecked, 0.6s Time] [2022-01-18 16:35:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-01-18 16:35:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1521. [2022-01-18 16:35:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.7223684210526315) internal successors, (2618), 1520 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2618 transitions. [2022-01-18 16:35:25,999 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2618 transitions. Word has length 35 [2022-01-18 16:35:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:25,999 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 2618 transitions. [2022-01-18 16:35:25,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2618 transitions. [2022-01-18 16:35:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:26,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:26,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:26,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:26,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:26,215 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1466592159, now seen corresponding path program 61 times [2022-01-18 16:35:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:26,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248610574] [2022-01-18 16:35:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:26,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248610574] [2022-01-18 16:35:26,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248610574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706674342] [2022-01-18 16:35:26,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:35:26,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:26,486 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:26,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:35:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:26,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:26,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:26,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:26,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:26,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:27,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:27,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:35:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:35:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706674342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:27,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:27,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-01-18 16:35:27,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779514285] [2022-01-18 16:35:27,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:27,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:35:27,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:35:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:35:27,215 INFO L87 Difference]: Start difference. First operand 1521 states and 2618 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:28,370 INFO L93 Difference]: Finished difference Result 2359 states and 4010 transitions. [2022-01-18 16:35:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:35:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:28,372 INFO L225 Difference]: With dead ends: 2359 [2022-01-18 16:35:28,372 INFO L226 Difference]: Without dead ends: 2344 [2022-01-18 16:35:28,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:35:28,373 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:28,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:35:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-01-18 16:35:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1325. [2022-01-18 16:35:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.7175226586102719) internal successors, (2274), 1324 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2274 transitions. [2022-01-18 16:35:28,387 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2274 transitions. Word has length 35 [2022-01-18 16:35:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2274 transitions. [2022-01-18 16:35:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2274 transitions. [2022-01-18 16:35:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:28,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:28,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:28,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:28,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:28,589 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1393746199, now seen corresponding path program 62 times [2022-01-18 16:35:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:28,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019013418] [2022-01-18 16:35:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:28,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:35:28,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019013418] [2022-01-18 16:35:28,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019013418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668298860] [2022-01-18 16:35:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:35:28,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:28,857 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:28,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:35:28,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:35:28,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:29,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:29,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:35:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:29,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:29,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:29,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:29,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:35:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:35:29,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668298860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:29,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:29,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:35:29,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268773575] [2022-01-18 16:35:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:29,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:35:29,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:35:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:35:29,554 INFO L87 Difference]: Start difference. First operand 1325 states and 2274 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:30,643 INFO L93 Difference]: Finished difference Result 1750 states and 2926 transitions. [2022-01-18 16:35:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:35:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:30,645 INFO L225 Difference]: With dead ends: 1750 [2022-01-18 16:35:30,645 INFO L226 Difference]: Without dead ends: 1734 [2022-01-18 16:35:30,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=3736, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:35:30,646 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:30,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 162 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:35:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-01-18 16:35:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1144. [2022-01-18 16:35:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 1.7147856517935258) internal successors, (1960), 1143 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1960 transitions. [2022-01-18 16:35:30,657 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1960 transitions. Word has length 35 [2022-01-18 16:35:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:30,657 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 1960 transitions. [2022-01-18 16:35:30,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1960 transitions. [2022-01-18 16:35:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:30,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:30,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:30,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:30,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 16:35:30,859 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1077070117, now seen corresponding path program 63 times [2022-01-18 16:35:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:30,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701673298] [2022-01-18 16:35:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:30,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:31,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:31,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701673298] [2022-01-18 16:35:31,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701673298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:31,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706114669] [2022-01-18 16:35:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:35:31,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:31,124 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:31,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:35:31,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:35:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:31,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:31,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:31,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:31,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:31,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:31,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:31,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:35:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:31,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706114669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:31,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:31,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136709529] [2022-01-18 16:35:31,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:31,864 INFO L87 Difference]: Start difference. First operand 1144 states and 1960 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:33,405 INFO L93 Difference]: Finished difference Result 1563 states and 2615 transitions. [2022-01-18 16:35:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:35:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:33,407 INFO L225 Difference]: With dead ends: 1563 [2022-01-18 16:35:33,407 INFO L226 Difference]: Without dead ends: 1537 [2022-01-18 16:35:33,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=859, Invalid=5621, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:35:33,408 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 215 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:33,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 114 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:35:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-01-18 16:35:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 895. [2022-01-18 16:35:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.7024608501118568) internal successors, (1522), 894 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1522 transitions. [2022-01-18 16:35:33,419 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1522 transitions. Word has length 35 [2022-01-18 16:35:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:33,419 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1522 transitions. [2022-01-18 16:35:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1522 transitions. [2022-01-18 16:35:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:33,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:33,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:33,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 16:35:33,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 16:35:33,620 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash -489324795, now seen corresponding path program 64 times [2022-01-18 16:35:33,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838070857] [2022-01-18 16:35:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:33,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:33,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838070857] [2022-01-18 16:35:33,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838070857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224168415] [2022-01-18 16:35:33,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:35:33,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:33,936 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:33,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:35:33,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:35:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:34,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:34,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:34,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:34,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:34,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:34,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:34,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:35:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:34,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224168415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:34,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:34,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:34,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982228106] [2022-01-18 16:35:34,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:34,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:34,666 INFO L87 Difference]: Start difference. First operand 895 states and 1522 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:35,753 INFO L93 Difference]: Finished difference Result 1522 states and 2512 transitions. [2022-01-18 16:35:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:35:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:35,755 INFO L225 Difference]: With dead ends: 1522 [2022-01-18 16:35:35,755 INFO L226 Difference]: Without dead ends: 1499 [2022-01-18 16:35:35,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=610, Invalid=3946, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:35:35,756 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:35,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 166 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:35:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-01-18 16:35:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 715. [2022-01-18 16:35:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.7016806722689075) internal successors, (1215), 714 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1215 transitions. [2022-01-18 16:35:35,764 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1215 transitions. Word has length 35 [2022-01-18 16:35:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1215 transitions. [2022-01-18 16:35:35,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1215 transitions. [2022-01-18 16:35:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:35,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:35,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:35,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:35,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:35,965 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash -558018303, now seen corresponding path program 65 times [2022-01-18 16:35:35,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864849339] [2022-01-18 16:35:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:35,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:36,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:36,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864849339] [2022-01-18 16:35:36,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864849339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:36,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484359694] [2022-01-18 16:35:36,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:35:36,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:36,222 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:36,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:35:36,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:35:36,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:36,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:35:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:36,911 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:35:36,911 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 65 treesize of output 45 [2022-01-18 16:35:36,985 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:35:36,985 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 50 treesize of output 26 [2022-01-18 16:35:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:37,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:38,118 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:35:38,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 154 [2022-01-18 16:35:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:38,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:38,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 248 [2022-01-18 16:35:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:40,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484359694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:40,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:40,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-01-18 16:35:40,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412891887] [2022-01-18 16:35:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 16:35:40,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 16:35:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:35:40,964 INFO L87 Difference]: Start difference. First operand 715 states and 1215 transitions. Second operand has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:51,439 INFO L93 Difference]: Finished difference Result 1318 states and 2186 transitions. [2022-01-18 16:35:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 16:35:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:51,440 INFO L225 Difference]: With dead ends: 1318 [2022-01-18 16:35:51,440 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 16:35:51,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12957 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3102, Invalid=33954, Unknown=0, NotChecked=0, Total=37056 [2022-01-18 16:35:51,442 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 433 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:51,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 347 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 16:35:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 16:35:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 764. [2022-01-18 16:35:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.6985583224115335) internal successors, (1296), 763 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1296 transitions. [2022-01-18 16:35:51,449 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1296 transitions. Word has length 35 [2022-01-18 16:35:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:51,450 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1296 transitions. [2022-01-18 16:35:51,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1296 transitions. [2022-01-18 16:35:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:51,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:51,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:51,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:51,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 16:35:51,651 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1466957033, now seen corresponding path program 66 times [2022-01-18 16:35:51,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:51,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260059083] [2022-01-18 16:35:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:51,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:51,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260059083] [2022-01-18 16:35:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260059083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210743363] [2022-01-18 16:35:51,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:35:51,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:51,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:51,907 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:51,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:35:51,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:35:51,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:51,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:35:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:52,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:52,307 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:35:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:52,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:52,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:52,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:52,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:35:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:53,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210743363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:53,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2022-01-18 16:35:53,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289954549] [2022-01-18 16:35:53,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:53,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:35:53,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:35:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:35:53,146 INFO L87 Difference]: Start difference. First operand 764 states and 1296 transitions. Second operand has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:56,232 INFO L93 Difference]: Finished difference Result 1489 states and 2454 transitions. [2022-01-18 16:35:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 16:35:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:56,234 INFO L225 Difference]: With dead ends: 1489 [2022-01-18 16:35:56,234 INFO L226 Difference]: Without dead ends: 1476 [2022-01-18 16:35:56,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5075 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2103, Invalid=14153, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 16:35:56,236 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:56,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 191 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 799 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-01-18 16:35:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-01-18 16:35:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 822. [2022-01-18 16:35:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.7028014616321558) internal successors, (1398), 821 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1398 transitions. [2022-01-18 16:35:56,244 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1398 transitions. Word has length 35 [2022-01-18 16:35:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1398 transitions. [2022-01-18 16:35:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1398 transitions. [2022-01-18 16:35:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:56,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:56,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:56,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:56,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 16:35:56,446 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -146609701, now seen corresponding path program 67 times [2022-01-18 16:35:56,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949368017] [2022-01-18 16:35:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:56,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:56,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:56,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949368017] [2022-01-18 16:35:56,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949368017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:56,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626338622] [2022-01-18 16:35:56,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:35:56,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:56,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:56,703 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:56,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:35:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:56,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:56,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:56,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:57,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:57,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:57,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:57,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:35:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:57,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626338622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:57,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:57,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-01-18 16:35:57,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623172002] [2022-01-18 16:35:57,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:57,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:35:57,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:57,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:35:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:35:57,454 INFO L87 Difference]: Start difference. First operand 822 states and 1398 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:58,791 INFO L93 Difference]: Finished difference Result 1422 states and 2355 transitions. [2022-01-18 16:35:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:35:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:35:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:58,793 INFO L225 Difference]: With dead ends: 1422 [2022-01-18 16:35:58,793 INFO L226 Difference]: Without dead ends: 1403 [2022-01-18 16:35:58,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=492, Invalid=4620, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:35:58,794 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:58,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 257 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:35:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-01-18 16:35:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 740. [2022-01-18 16:35:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.6995940460081191) internal successors, (1256), 739 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1256 transitions. [2022-01-18 16:35:58,801 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1256 transitions. Word has length 35 [2022-01-18 16:35:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:58,801 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1256 transitions. [2022-01-18 16:35:58,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1256 transitions. [2022-01-18 16:35:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:35:58,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:58,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:58,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 16:35:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 16:35:59,012 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:35:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2054702355, now seen corresponding path program 68 times [2022-01-18 16:35:59,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819864366] [2022-01-18 16:35:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:59,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819864366] [2022-01-18 16:35:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819864366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238949272] [2022-01-18 16:35:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:35:59,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:59,254 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:35:59,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:35:59,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:35:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:59,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:35:59,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:35:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:59,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:59,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:59,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:35:59,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:59,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:35:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:59,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238949272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:59,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:59,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:35:59,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978524575] [2022-01-18 16:35:59,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:59,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:59,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:59,993 INFO L87 Difference]: Start difference. First operand 740 states and 1256 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:01,206 INFO L93 Difference]: Finished difference Result 1390 states and 2288 transitions. [2022-01-18 16:36:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:36:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:01,208 INFO L225 Difference]: With dead ends: 1390 [2022-01-18 16:36:01,208 INFO L226 Difference]: Without dead ends: 1377 [2022-01-18 16:36:01,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=578, Invalid=4824, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:36:01,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:01,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 184 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-01-18 16:36:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 739. [2022-01-18 16:36:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.6978319783197833) internal successors, (1253), 738 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1253 transitions. [2022-01-18 16:36:01,216 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1253 transitions. Word has length 35 [2022-01-18 16:36:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:01,216 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1253 transitions. [2022-01-18 16:36:01,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1253 transitions. [2022-01-18 16:36:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:01,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:01,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:01,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:01,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-18 16:36:01,417 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1987503899, now seen corresponding path program 69 times [2022-01-18 16:36:01,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:01,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801423335] [2022-01-18 16:36:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:01,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:01,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:01,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801423335] [2022-01-18 16:36:01,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801423335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:01,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421535973] [2022-01-18 16:36:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:36:01,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:01,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:01,686 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:01,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:36:01,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:36:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:36:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:01,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:01,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:01,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:36:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:02,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:02,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:02,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:02,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:36:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:02,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421535973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:02,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:02,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:36:02,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733478746] [2022-01-18 16:36:02,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:02,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:36:02,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:02,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:36:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:36:02,788 INFO L87 Difference]: Start difference. First operand 739 states and 1253 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:05,167 INFO L93 Difference]: Finished difference Result 1274 states and 2107 transitions. [2022-01-18 16:36:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:36:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:05,168 INFO L225 Difference]: With dead ends: 1274 [2022-01-18 16:36:05,168 INFO L226 Difference]: Without dead ends: 1264 [2022-01-18 16:36:05,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2029, Invalid=12013, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:36:05,170 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 329 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:05,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 441 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1190 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-01-18 16:36:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-01-18 16:36:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 719. [2022-01-18 16:36:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.701949860724234) internal successors, (1222), 718 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1222 transitions. [2022-01-18 16:36:05,177 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1222 transitions. Word has length 35 [2022-01-18 16:36:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:05,177 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1222 transitions. [2022-01-18 16:36:05,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1222 transitions. [2022-01-18 16:36:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:05,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:05,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:05,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:05,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:05,378 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1700124125, now seen corresponding path program 70 times [2022-01-18 16:36:05,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:05,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000797918] [2022-01-18 16:36:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:05,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:05,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:05,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000797918] [2022-01-18 16:36:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000797918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:05,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750815500] [2022-01-18 16:36:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:36:05,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:05,614 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:36:05,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:36:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:05,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:05,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:06,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:06,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:06,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:06,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:36:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750815500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:06,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:06,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:36:06,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150481234] [2022-01-18 16:36:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:06,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:36:06,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:36:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:36:06,337 INFO L87 Difference]: Start difference. First operand 719 states and 1222 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:07,577 INFO L93 Difference]: Finished difference Result 1340 states and 2213 transitions. [2022-01-18 16:36:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:36:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:07,579 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 16:36:07,579 INFO L226 Difference]: Without dead ends: 1329 [2022-01-18 16:36:07,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=542, Invalid=4570, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:36:07,580 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:07,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 198 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-01-18 16:36:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 715. [2022-01-18 16:36:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.6974789915966386) internal successors, (1212), 714 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1212 transitions. [2022-01-18 16:36:07,587 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1212 transitions. Word has length 35 [2022-01-18 16:36:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:07,587 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1212 transitions. [2022-01-18 16:36:07,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1212 transitions. [2022-01-18 16:36:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:07,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:07,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:07,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:07,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:07,789 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1298970401, now seen corresponding path program 71 times [2022-01-18 16:36:07,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:07,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686653682] [2022-01-18 16:36:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:07,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:08,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686653682] [2022-01-18 16:36:08,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686653682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681421554] [2022-01-18 16:36:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:36:08,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:08,031 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:08,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:36:08,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:36:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:08,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:08,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:08,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:08,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:08,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:08,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:08,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:36:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681421554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:08,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:36:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554008920] [2022-01-18 16:36:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:08,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:36:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:36:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:36:08,753 INFO L87 Difference]: Start difference. First operand 715 states and 1212 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:09,798 INFO L93 Difference]: Finished difference Result 1088 states and 1831 transitions. [2022-01-18 16:36:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:36:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:09,799 INFO L225 Difference]: With dead ends: 1088 [2022-01-18 16:36:09,799 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 16:36:09,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=653, Invalid=4039, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:36:09,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 191 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:09,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 193 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 16:36:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 716. [2022-01-18 16:36:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.697902097902098) internal successors, (1214), 715 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1214 transitions. [2022-01-18 16:36:09,806 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1214 transitions. Word has length 35 [2022-01-18 16:36:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:09,806 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1214 transitions. [2022-01-18 16:36:09,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1214 transitions. [2022-01-18 16:36:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:09,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:09,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:09,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:10,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:10,022 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:10,022 INFO L85 PathProgramCache]: Analyzing trace with hash -416904677, now seen corresponding path program 72 times [2022-01-18 16:36:10,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:10,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467180572] [2022-01-18 16:36:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:10,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:10,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467180572] [2022-01-18 16:36:10,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467180572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857364417] [2022-01-18 16:36:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:36:10,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:10,277 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:10,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:36:10,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:36:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:36:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:10,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:10,500 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 13 treesize of output 9 [2022-01-18 16:36:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:10,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:10,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:10,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:10,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:10,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:36:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:11,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857364417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:11,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:11,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 35 [2022-01-18 16:36:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53762185] [2022-01-18 16:36:11,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:36:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:36:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:36:11,166 INFO L87 Difference]: Start difference. First operand 716 states and 1214 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 16:36:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:12,703 INFO L93 Difference]: Finished difference Result 1540 states and 2562 transitions. [2022-01-18 16:36:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:36:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 35 [2022-01-18 16:36:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:12,705 INFO L225 Difference]: With dead ends: 1540 [2022-01-18 16:36:12,705 INFO L226 Difference]: Without dead ends: 1517 [2022-01-18 16:36:12,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=987, Invalid=6845, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:36:12,708 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 275 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:12,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 183 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:36:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-01-18 16:36:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 716. [2022-01-18 16:36:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.697902097902098) internal successors, (1214), 715 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1214 transitions. [2022-01-18 16:36:12,716 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1214 transitions. Word has length 35 [2022-01-18 16:36:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:12,716 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1214 transitions. [2022-01-18 16:36:12,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 16:36:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1214 transitions. [2022-01-18 16:36:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:12,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:12,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:12,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:12,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 16:36:12,917 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1458577665, now seen corresponding path program 73 times [2022-01-18 16:36:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47848851] [2022-01-18 16:36:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:13,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47848851] [2022-01-18 16:36:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47848851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344786574] [2022-01-18 16:36:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:36:13,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:13,173 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:13,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:36:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:13,363 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 13 treesize of output 9 [2022-01-18 16:36:13,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:13,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:13,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:13,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:13,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:13,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:36:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:13,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344786574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:13,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:13,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:36:13,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869016230] [2022-01-18 16:36:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:13,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:36:13,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:36:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:36:13,886 INFO L87 Difference]: Start difference. First operand 716 states and 1214 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:15,476 INFO L93 Difference]: Finished difference Result 1149 states and 1928 transitions. [2022-01-18 16:36:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:36:15,476 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:15,478 INFO L225 Difference]: With dead ends: 1149 [2022-01-18 16:36:15,478 INFO L226 Difference]: Without dead ends: 1136 [2022-01-18 16:36:15,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=895, Invalid=5425, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:36:15,478 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:15,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 183 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-18 16:36:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 717. [2022-01-18 16:36:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.6983240223463687) internal successors, (1216), 716 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1216 transitions. [2022-01-18 16:36:15,485 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1216 transitions. Word has length 35 [2022-01-18 16:36:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:15,485 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1216 transitions. [2022-01-18 16:36:15,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1216 transitions. [2022-01-18 16:36:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:15,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:15,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:15,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:15,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:15,687 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1954323907, now seen corresponding path program 74 times [2022-01-18 16:36:15,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:15,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153917908] [2022-01-18 16:36:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:15,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:15,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153917908] [2022-01-18 16:36:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153917908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135289751] [2022-01-18 16:36:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:36:15,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:15,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:15,947 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:15,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:36:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:15,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:36:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:16,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:16,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:16,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:16,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:16,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:16,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:16,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:36:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:16,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135289751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:16,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:16,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:36:16,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675746429] [2022-01-18 16:36:16,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:16,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:36:16,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:36:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:36:16,684 INFO L87 Difference]: Start difference. First operand 717 states and 1216 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:17,833 INFO L93 Difference]: Finished difference Result 1029 states and 1732 transitions. [2022-01-18 16:36:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:36:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:17,834 INFO L225 Difference]: With dead ends: 1029 [2022-01-18 16:36:17,835 INFO L226 Difference]: Without dead ends: 1019 [2022-01-18 16:36:17,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=675, Invalid=3881, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:36:17,835 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 181 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:17,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-01-18 16:36:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 710. [2022-01-18 16:36:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.7009873060648801) internal successors, (1206), 709 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1206 transitions. [2022-01-18 16:36:17,841 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1206 transitions. Word has length 35 [2022-01-18 16:36:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:17,841 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1206 transitions. [2022-01-18 16:36:17,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1206 transitions. [2022-01-18 16:36:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:17,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:17,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:17,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:18,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:18,043 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:18,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2097831233, now seen corresponding path program 75 times [2022-01-18 16:36:18,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:18,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257739931] [2022-01-18 16:36:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:18,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:18,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257739931] [2022-01-18 16:36:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257739931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004509373] [2022-01-18 16:36:18,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:36:18,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:18,279 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:18,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:36:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:36:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:36:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:18,529 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:36:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:18,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-18 16:36:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:18,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:18,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:18,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:19,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:19,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:36:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004509373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:19,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-18 16:36:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853382499] [2022-01-18 16:36:19,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:36:19,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:36:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:36:19,422 INFO L87 Difference]: Start difference. First operand 710 states and 1206 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:21,047 INFO L93 Difference]: Finished difference Result 1398 states and 2308 transitions. [2022-01-18 16:36:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:36:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:21,048 INFO L225 Difference]: With dead ends: 1398 [2022-01-18 16:36:21,048 INFO L226 Difference]: Without dead ends: 1389 [2022-01-18 16:36:21,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1441, Invalid=6931, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:36:21,049 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:21,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 238 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 716 Invalid, 0 Unknown, 262 Unchecked, 0.3s Time] [2022-01-18 16:36:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-01-18 16:36:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 815. [2022-01-18 16:36:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.7137592137592137) internal successors, (1395), 814 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1395 transitions. [2022-01-18 16:36:21,058 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1395 transitions. Word has length 35 [2022-01-18 16:36:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:21,058 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1395 transitions. [2022-01-18 16:36:21,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1395 transitions. [2022-01-18 16:36:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:21,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:21,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:21,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 16:36:21,263 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1315070339, now seen corresponding path program 76 times [2022-01-18 16:36:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690011338] [2022-01-18 16:36:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:21,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:21,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690011338] [2022-01-18 16:36:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690011338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94089680] [2022-01-18 16:36:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:36:21,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:21,507 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:21,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:36:21,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:36:21,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:21,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:21,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:21,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:21,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:21,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:22,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:22,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:36:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:22,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94089680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:22,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:22,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:36:22,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273748820] [2022-01-18 16:36:22,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:22,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:36:22,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:36:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:36:22,187 INFO L87 Difference]: Start difference. First operand 815 states and 1395 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:23,924 INFO L93 Difference]: Finished difference Result 1414 states and 2364 transitions. [2022-01-18 16:36:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:36:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:23,925 INFO L225 Difference]: With dead ends: 1414 [2022-01-18 16:36:23,925 INFO L226 Difference]: Without dead ends: 1388 [2022-01-18 16:36:23,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=965, Invalid=6517, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:36:23,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 268 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:23,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 202 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-01-18 16:36:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 930. [2022-01-18 16:36:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 1.7351991388589882) internal successors, (1612), 929 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1612 transitions. [2022-01-18 16:36:23,935 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1612 transitions. Word has length 35 [2022-01-18 16:36:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:23,935 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1612 transitions. [2022-01-18 16:36:23,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1612 transitions. [2022-01-18 16:36:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:23,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:23,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:23,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:24,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 16:36:24,137 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1609390741, now seen corresponding path program 77 times [2022-01-18 16:36:24,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:24,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76658620] [2022-01-18 16:36:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:24,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:24,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76658620] [2022-01-18 16:36:24,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76658620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613874766] [2022-01-18 16:36:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:36:24,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:24,376 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:24,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:36:24,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:36:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:36:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:24,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:24,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:24,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:24,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:24,840 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 36 treesize of output 38 [2022-01-18 16:36:24,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:24,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:36:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:25,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613874766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:25,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:25,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-01-18 16:36:25,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678155138] [2022-01-18 16:36:25,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:25,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:36:25,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:36:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:36:25,194 INFO L87 Difference]: Start difference. First operand 930 states and 1612 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:26,378 INFO L93 Difference]: Finished difference Result 1200 states and 2058 transitions. [2022-01-18 16:36:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:36:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:26,379 INFO L225 Difference]: With dead ends: 1200 [2022-01-18 16:36:26,379 INFO L226 Difference]: Without dead ends: 1187 [2022-01-18 16:36:26,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=859, Invalid=5147, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:36:26,380 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 226 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:26,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 177 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-01-18 16:36:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 929. [2022-01-18 16:36:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.7230603448275863) internal successors, (1599), 928 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1599 transitions. [2022-01-18 16:36:26,388 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1599 transitions. Word has length 35 [2022-01-18 16:36:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:26,389 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1599 transitions. [2022-01-18 16:36:26,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1599 transitions. [2022-01-18 16:36:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:26,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:26,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:26,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:26,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:26,603 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -727325017, now seen corresponding path program 78 times [2022-01-18 16:36:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060641210] [2022-01-18 16:36:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:26,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:26,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060641210] [2022-01-18 16:36:26,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060641210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576846598] [2022-01-18 16:36:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:36:26,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:26,841 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:26,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:36:26,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:36:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:27,020 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 13 treesize of output 9 [2022-01-18 16:36:27,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:27,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:27,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:27,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:27,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:27,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:36:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:27,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576846598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:27,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:27,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:36:27,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832961221] [2022-01-18 16:36:27,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:27,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:36:27,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:36:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:36:27,511 INFO L87 Difference]: Start difference. First operand 929 states and 1599 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:28,862 INFO L93 Difference]: Finished difference Result 1694 states and 2818 transitions. [2022-01-18 16:36:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:36:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:28,864 INFO L225 Difference]: With dead ends: 1694 [2022-01-18 16:36:28,864 INFO L226 Difference]: Without dead ends: 1671 [2022-01-18 16:36:28,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=5119, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:36:28,864 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:28,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 192 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:36:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-01-18 16:36:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1153. [2022-01-18 16:36:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.7065972222222223) internal successors, (1966), 1152 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1966 transitions. [2022-01-18 16:36:28,875 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1966 transitions. Word has length 35 [2022-01-18 16:36:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:28,875 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1966 transitions. [2022-01-18 16:36:28,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1966 transitions. [2022-01-18 16:36:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:28,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:28,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:28,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:29,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:29,077 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1122150351, now seen corresponding path program 79 times [2022-01-18 16:36:29,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:29,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858820033] [2022-01-18 16:36:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:29,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:29,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858820033] [2022-01-18 16:36:29,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858820033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815565860] [2022-01-18 16:36:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:36:29,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:29,313 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:29,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:36:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:29,492 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 13 treesize of output 9 [2022-01-18 16:36:29,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:29,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:29,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:29,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:29,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:29,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:36:30,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815565860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:30,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:30,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:36:30,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14644483] [2022-01-18 16:36:30,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:30,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:36:30,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:36:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:36:30,008 INFO L87 Difference]: Start difference. First operand 1153 states and 1966 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:31,015 INFO L93 Difference]: Finished difference Result 1697 states and 2846 transitions. [2022-01-18 16:36:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:36:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:31,017 INFO L225 Difference]: With dead ends: 1697 [2022-01-18 16:36:31,017 INFO L226 Difference]: Without dead ends: 1688 [2022-01-18 16:36:31,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=598, Invalid=3308, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:36:31,018 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:31,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 164 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:36:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-01-18 16:36:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1160. [2022-01-18 16:36:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.7083692838654012) internal successors, (1980), 1159 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1980 transitions. [2022-01-18 16:36:31,029 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1980 transitions. Word has length 35 [2022-01-18 16:36:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:31,029 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1980 transitions. [2022-01-18 16:36:31,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1980 transitions. [2022-01-18 16:36:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:31,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:31,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:31,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-18 16:36:31,231 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -428725277, now seen corresponding path program 80 times [2022-01-18 16:36:31,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027951543] [2022-01-18 16:36:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:31,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:31,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027951543] [2022-01-18 16:36:31,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027951543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126257075] [2022-01-18 16:36:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:36:31,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:31,494 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:31,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:36:31,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:36:31,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:31,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:31,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:36:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:31,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:31,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:31,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:31,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:31,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 16:36:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126257075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:32,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:32,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-01-18 16:36:32,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302369657] [2022-01-18 16:36:32,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:32,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:36:32,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:36:32,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:36:32,195 INFO L87 Difference]: Start difference. First operand 1160 states and 1980 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:33,126 INFO L93 Difference]: Finished difference Result 2062 states and 3448 transitions. [2022-01-18 16:36:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:36:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:33,128 INFO L225 Difference]: With dead ends: 2062 [2022-01-18 16:36:33,128 INFO L226 Difference]: Without dead ends: 2049 [2022-01-18 16:36:33,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:36:33,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:33,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 199 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:36:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-01-18 16:36:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1248. [2022-01-18 16:36:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.7177225340817963) internal successors, (2142), 1247 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2142 transitions. [2022-01-18 16:36:33,140 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2142 transitions. Word has length 35 [2022-01-18 16:36:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:33,140 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 2142 transitions. [2022-01-18 16:36:33,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2142 transitions. [2022-01-18 16:36:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:33,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:33,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:33,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:33,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:33,342 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1985067287, now seen corresponding path program 81 times [2022-01-18 16:36:33,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:33,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101613227] [2022-01-18 16:36:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:33,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:33,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101613227] [2022-01-18 16:36:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101613227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501272546] [2022-01-18 16:36:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:36:33,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:33,585 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:33,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:36:33,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:36:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:36:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:33,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:33,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:36:33,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:33,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:36:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:34,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:34,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:34,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:34,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:34,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 16:36:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:34,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501272546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:34,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:34,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-01-18 16:36:34,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297636047] [2022-01-18 16:36:34,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:34,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 16:36:34,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 16:36:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:36:34,774 INFO L87 Difference]: Start difference. First operand 1248 states and 2142 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:37,485 INFO L93 Difference]: Finished difference Result 2151 states and 3602 transitions. [2022-01-18 16:36:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 16:36:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:37,487 INFO L225 Difference]: With dead ends: 2151 [2022-01-18 16:36:37,488 INFO L226 Difference]: Without dead ends: 2141 [2022-01-18 16:36:37,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2161, Invalid=10049, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:36:37,488 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 241 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:37,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 214 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 799 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-01-18 16:36:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-01-18 16:36:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1258. [2022-01-18 16:36:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 1.7199681782020684) internal successors, (2162), 1257 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2162 transitions. [2022-01-18 16:36:37,503 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2162 transitions. Word has length 35 [2022-01-18 16:36:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2162 transitions. [2022-01-18 16:36:37,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2162 transitions. [2022-01-18 16:36:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:37,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:37,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:37,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:37,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:37,705 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1166990397, now seen corresponding path program 82 times [2022-01-18 16:36:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270811099] [2022-01-18 16:36:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:37,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:37,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270811099] [2022-01-18 16:36:37,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270811099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086821419] [2022-01-18 16:36:37,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:36:37,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:37,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:37,937 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:37,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:36:37,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:36:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:36:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:38,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:38,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:36:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:38,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:38,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:38,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:38,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:38,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:36:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:38,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086821419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:38,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:38,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:36:38,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593385620] [2022-01-18 16:36:38,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:38,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:36:38,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:36:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:36:38,673 INFO L87 Difference]: Start difference. First operand 1258 states and 2162 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:39,690 INFO L93 Difference]: Finished difference Result 1955 states and 3246 transitions. [2022-01-18 16:36:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:36:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:39,692 INFO L225 Difference]: With dead ends: 1955 [2022-01-18 16:36:39,692 INFO L226 Difference]: Without dead ends: 1939 [2022-01-18 16:36:39,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 24 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 16:36:39,692 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:39,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 172 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:36:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-01-18 16:36:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1271. [2022-01-18 16:36:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 1.7188976377952756) internal successors, (2183), 1270 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 2183 transitions. [2022-01-18 16:36:39,704 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 2183 transitions. Word has length 35 [2022-01-18 16:36:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:39,704 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 2183 transitions. [2022-01-18 16:36:39,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 2183 transitions. [2022-01-18 16:36:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:39,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:39,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:39,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:39,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-01-18 16:36:39,906 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1244115189, now seen corresponding path program 83 times [2022-01-18 16:36:39,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:39,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060355279] [2022-01-18 16:36:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:39,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:40,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060355279] [2022-01-18 16:36:40,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060355279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117945749] [2022-01-18 16:36:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:36:40,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:40,173 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:40,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:36:40,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:36:40,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 16:36:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:40,792 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:36:40,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 43 [2022-01-18 16:36:40,826 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:36:40,826 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 42 treesize of output 22 [2022-01-18 16:36:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:40,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:42,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:42,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:42,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2022-01-18 16:36:42,747 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:36:42,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 174 [2022-01-18 16:36:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117945749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:44,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 57 [2022-01-18 16:36:44,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275652014] [2022-01-18 16:36:44,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:44,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 16:36:44,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 16:36:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3040, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:36:44,012 INFO L87 Difference]: Start difference. First operand 1271 states and 2183 transitions. Second operand has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:52,138 INFO L93 Difference]: Finished difference Result 2693 states and 4543 transitions. [2022-01-18 16:36:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-18 16:36:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:36:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:52,141 INFO L225 Difference]: With dead ends: 2693 [2022-01-18 16:36:52,141 INFO L226 Difference]: Without dead ends: 2678 [2022-01-18 16:36:52,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10555 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2676, Invalid=27774, Unknown=0, NotChecked=0, Total=30450 [2022-01-18 16:36:52,143 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 365 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:52,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 682 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:36:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-01-18 16:36:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1466. [2022-01-18 16:36:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 1.7276450511945391) internal successors, (2531), 1465 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2531 transitions. [2022-01-18 16:36:52,159 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2531 transitions. Word has length 35 [2022-01-18 16:36:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:52,159 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 2531 transitions. [2022-01-18 16:36:52,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2531 transitions. [2022-01-18 16:36:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:36:52,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:52,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:52,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:52,361 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:36:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1777918399, now seen corresponding path program 84 times [2022-01-18 16:36:52,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679057944] [2022-01-18 16:36:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:52,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:36:52,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679057944] [2022-01-18 16:36:52,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679057944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046737969] [2022-01-18 16:36:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:36:52,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:52,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:52,604 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:36:52,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:36:52,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:36:52,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:52,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-18 16:36:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:53,272 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:36:53,272 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 67 treesize of output 47 [2022-01-18 16:36:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:53,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:53,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 16:36:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:54,772 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:36:54,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 158 [2022-01-18 16:36:55,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:55,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:55,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 150 [2022-01-18 16:36:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:56,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046737969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:56,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:56,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-01-18 16:36:56,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161536486] [2022-01-18 16:36:56,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:56,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:36:56,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:36:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3053, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:36:56,828 INFO L87 Difference]: Start difference. First operand 1466 states and 2531 transitions. Second operand has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:08,607 INFO L93 Difference]: Finished difference Result 3658 states and 6223 transitions. [2022-01-18 16:37:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 16:37:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:08,611 INFO L225 Difference]: With dead ends: 3658 [2022-01-18 16:37:08,611 INFO L226 Difference]: Without dead ends: 3638 [2022-01-18 16:37:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15879 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4529, Invalid=41481, Unknown=0, NotChecked=0, Total=46010 [2022-01-18 16:37:08,613 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 244 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1299 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 377 Invalid, 4497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2895 Invalid, 0 Unknown, 1299 Unchecked, 1.2s Time] [2022-01-18 16:37:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2022-01-18 16:37:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2688. [2022-01-18 16:37:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 1.7413472273911426) internal successors, (4679), 2687 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4679 transitions. [2022-01-18 16:37:08,649 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4679 transitions. Word has length 35 [2022-01-18 16:37:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:08,649 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 4679 transitions. [2022-01-18 16:37:08,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4679 transitions. [2022-01-18 16:37:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:08,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:08,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:08,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:08,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:08,852 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash 979629667, now seen corresponding path program 85 times [2022-01-18 16:37:08,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:08,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109536224] [2022-01-18 16:37:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:08,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:09,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109536224] [2022-01-18 16:37:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109536224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663763160] [2022-01-18 16:37:09,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:37:09,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:09,093 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:09,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:37:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:09,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:09,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:09,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:09,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:09,523 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 36 treesize of output 38 [2022-01-18 16:37:09,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:09,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:09,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663763160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:09,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:09,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:09,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817412520] [2022-01-18 16:37:09,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:09,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:09,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:09,800 INFO L87 Difference]: Start difference. First operand 2688 states and 4679 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:10,863 INFO L93 Difference]: Finished difference Result 3558 states and 6114 transitions. [2022-01-18 16:37:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:37:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:10,867 INFO L225 Difference]: With dead ends: 3558 [2022-01-18 16:37:10,867 INFO L226 Difference]: Without dead ends: 3542 [2022-01-18 16:37:10,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=602, Invalid=3558, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 16:37:10,868 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:10,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 190 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:37:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-01-18 16:37:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 1027. [2022-01-18 16:37:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 1.736842105263158) internal successors, (1782), 1026 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1782 transitions. [2022-01-18 16:37:10,886 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1782 transitions. Word has length 35 [2022-01-18 16:37:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:10,886 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1782 transitions. [2022-01-18 16:37:10,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1782 transitions. [2022-01-18 16:37:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:10,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:10,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:10,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:11,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 16:37:11,097 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1240425543, now seen corresponding path program 86 times [2022-01-18 16:37:11,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304106144] [2022-01-18 16:37:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:11,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:11,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304106144] [2022-01-18 16:37:11,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304106144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007156685] [2022-01-18 16:37:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:37:11,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:11,333 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:11,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:37:11,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:37:11,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:11,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:11,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:11,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:11,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:11,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:11,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:11,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:11,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 26 [2022-01-18 16:37:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:12,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007156685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:12,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:12,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:12,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126579088] [2022-01-18 16:37:12,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:12,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:12,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:12,042 INFO L87 Difference]: Start difference. First operand 1027 states and 1782 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:12,940 INFO L93 Difference]: Finished difference Result 1593 states and 2690 transitions. [2022-01-18 16:37:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:37:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:12,942 INFO L225 Difference]: With dead ends: 1593 [2022-01-18 16:37:12,942 INFO L226 Difference]: Without dead ends: 1583 [2022-01-18 16:37:12,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=564, Invalid=3468, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:37:12,942 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:12,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 195 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:37:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-01-18 16:37:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 968. [2022-01-18 16:37:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.7300930713547054) internal successors, (1673), 967 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1673 transitions. [2022-01-18 16:37:12,952 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1673 transitions. Word has length 35 [2022-01-18 16:37:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:12,952 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1673 transitions. [2022-01-18 16:37:12,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1673 transitions. [2022-01-18 16:37:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:12,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:12,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:12,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 16:37:13,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:13,154 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1517122523, now seen corresponding path program 87 times [2022-01-18 16:37:13,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840399897] [2022-01-18 16:37:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:13,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:13,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840399897] [2022-01-18 16:37:13,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840399897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30550948] [2022-01-18 16:37:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:37:13,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:13,394 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:13,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:37:13,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:37:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:37:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:13,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:37:13,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:13,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:37:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:13,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:14,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:14,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:14,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:14,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:37:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30550948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:14,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:14,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-01-18 16:37:14,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558650400] [2022-01-18 16:37:14,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:14,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 16:37:14,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 16:37:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:37:14,434 INFO L87 Difference]: Start difference. First operand 968 states and 1673 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:16,337 INFO L93 Difference]: Finished difference Result 1706 states and 2857 transitions. [2022-01-18 16:37:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:37:16,337 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:16,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:16,339 INFO L225 Difference]: With dead ends: 1706 [2022-01-18 16:37:16,339 INFO L226 Difference]: Without dead ends: 1696 [2022-01-18 16:37:16,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1587, Invalid=8115, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:37:16,340 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 415 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:16,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 330 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 798 Invalid, 0 Unknown, 319 Unchecked, 0.4s Time] [2022-01-18 16:37:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-01-18 16:37:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 918. [2022-01-18 16:37:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.7328244274809161) internal successors, (1589), 917 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1589 transitions. [2022-01-18 16:37:16,352 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1589 transitions. Word has length 35 [2022-01-18 16:37:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:16,352 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1589 transitions. [2022-01-18 16:37:16,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1589 transitions. [2022-01-18 16:37:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:16,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:16,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:16,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:16,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:16,567 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1870483713, now seen corresponding path program 88 times [2022-01-18 16:37:16,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:16,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35875619] [2022-01-18 16:37:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:16,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35875619] [2022-01-18 16:37:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35875619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407423727] [2022-01-18 16:37:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:37:16,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:16,819 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:16,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:37:16,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:37:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:16,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:16,991 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 13 treesize of output 9 [2022-01-18 16:37:17,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:17,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:17,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:17,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:17,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:17,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:37:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:17,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407423727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:17,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:17,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128681600] [2022-01-18 16:37:17,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:17,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:17,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:17,527 INFO L87 Difference]: Start difference. First operand 918 states and 1589 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:18,694 INFO L93 Difference]: Finished difference Result 1372 states and 2329 transitions. [2022-01-18 16:37:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:37:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:18,696 INFO L225 Difference]: With dead ends: 1372 [2022-01-18 16:37:18,696 INFO L226 Difference]: Without dead ends: 1361 [2022-01-18 16:37:18,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=704, Invalid=4126, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:37:18,697 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:18,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 224 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:37:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-18 16:37:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 926. [2022-01-18 16:37:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.731891891891892) internal successors, (1602), 925 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1602 transitions. [2022-01-18 16:37:18,705 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1602 transitions. Word has length 35 [2022-01-18 16:37:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:18,705 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1602 transitions. [2022-01-18 16:37:18,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1602 transitions. [2022-01-18 16:37:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:18,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:18,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:18,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:18,907 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1542417859, now seen corresponding path program 89 times [2022-01-18 16:37:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:18,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974755456] [2022-01-18 16:37:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:18,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:19,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974755456] [2022-01-18 16:37:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974755456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323269133] [2022-01-18 16:37:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:37:19,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:19,177 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:19,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:37:19,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:37:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:19,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 16:37:19,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:19,766 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:37:19,766 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 59 treesize of output 39 [2022-01-18 16:37:19,833 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:37:19,833 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 39 treesize of output 19 [2022-01-18 16:37:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:19,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:21,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:21,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2022-01-18 16:37:22,064 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:37:22,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 178 [2022-01-18 16:37:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323269133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:24,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:24,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 58 [2022-01-18 16:37:24,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077948045] [2022-01-18 16:37:24,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:24,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:37:24,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:37:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:37:24,078 INFO L87 Difference]: Start difference. First operand 926 states and 1602 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:30,073 INFO L93 Difference]: Finished difference Result 1704 states and 2857 transitions. [2022-01-18 16:37:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 16:37:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:30,075 INFO L225 Difference]: With dead ends: 1704 [2022-01-18 16:37:30,075 INFO L226 Difference]: Without dead ends: 1685 [2022-01-18 16:37:30,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7764 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2131, Invalid=21739, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 16:37:30,076 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 288 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:30,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 340 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:37:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-01-18 16:37:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 925. [2022-01-18 16:37:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.7305194805194806) internal successors, (1599), 924 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1599 transitions. [2022-01-18 16:37:30,086 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1599 transitions. Word has length 35 [2022-01-18 16:37:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:30,086 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1599 transitions. [2022-01-18 16:37:30,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1599 transitions. [2022-01-18 16:37:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:30,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:30,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:30,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:30,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-01-18 16:37:30,287 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -954672537, now seen corresponding path program 90 times [2022-01-18 16:37:30,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:30,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89546992] [2022-01-18 16:37:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:30,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:30,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:30,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89546992] [2022-01-18 16:37:30,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89546992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:30,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122700463] [2022-01-18 16:37:30,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:37:30,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:30,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:30,519 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:37:30,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:37:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:30,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 16:37:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:31,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 48 [2022-01-18 16:37:31,193 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:37:31,193 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 46 treesize of output 22 [2022-01-18 16:37:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:31,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:32,623 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:37:32,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 160 [2022-01-18 16:37:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:33,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:33,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 221 [2022-01-18 16:37:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:35,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122700463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:35,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:35,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-01-18 16:37:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416769539] [2022-01-18 16:37:35,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:35,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-18 16:37:35,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-18 16:37:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 16:37:35,840 INFO L87 Difference]: Start difference. First operand 925 states and 1599 transitions. Second operand has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:40,088 INFO L93 Difference]: Finished difference Result 1506 states and 2581 transitions. [2022-01-18 16:37:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 16:37:40,088 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:40,090 INFO L225 Difference]: With dead ends: 1506 [2022-01-18 16:37:40,090 INFO L226 Difference]: Without dead ends: 1477 [2022-01-18 16:37:40,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4886 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1439, Invalid=15331, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 16:37:40,091 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 268 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 3303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1258 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:40,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 451 Invalid, 3303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1884 Invalid, 0 Unknown, 1258 Unchecked, 0.7s Time] [2022-01-18 16:37:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-01-18 16:37:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1013. [2022-01-18 16:37:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.7292490118577075) internal successors, (1750), 1012 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1750 transitions. [2022-01-18 16:37:40,101 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1750 transitions. Word has length 35 [2022-01-18 16:37:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1750 transitions. [2022-01-18 16:37:40,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1750 transitions. [2022-01-18 16:37:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:40,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:40,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:40,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:40,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:40,302 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 121038619, now seen corresponding path program 91 times [2022-01-18 16:37:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384322965] [2022-01-18 16:37:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:40,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:40,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384322965] [2022-01-18 16:37:40,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384322965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648943444] [2022-01-18 16:37:40,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:37:40,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:40,535 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:40,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:37:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:40,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:40,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:40,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:40,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:40,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:41,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:41,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:37:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:41,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648943444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:41,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:41,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:41,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111737169] [2022-01-18 16:37:41,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:41,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:41,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:41,248 INFO L87 Difference]: Start difference. First operand 1013 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:42,268 INFO L93 Difference]: Finished difference Result 1481 states and 2520 transitions. [2022-01-18 16:37:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:37:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:42,270 INFO L225 Difference]: With dead ends: 1481 [2022-01-18 16:37:42,270 INFO L226 Difference]: Without dead ends: 1468 [2022-01-18 16:37:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=4039, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:37:42,270 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:42,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 228 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:37:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-01-18 16:37:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 923. [2022-01-18 16:37:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.729934924078091) internal successors, (1595), 922 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1595 transitions. [2022-01-18 16:37:42,279 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1595 transitions. Word has length 35 [2022-01-18 16:37:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1595 transitions. [2022-01-18 16:37:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1595 transitions. [2022-01-18 16:37:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:42,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:42,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:42,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:42,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:42,495 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1129531615, now seen corresponding path program 92 times [2022-01-18 16:37:42,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041647779] [2022-01-18 16:37:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:42,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:42,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041647779] [2022-01-18 16:37:42,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041647779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256878858] [2022-01-18 16:37:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:37:42,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:42,726 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:42,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:37:42,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:37:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:42,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:42,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:42,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:43,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:43,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:43,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:43,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:37:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256878858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:43,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:43,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170936021] [2022-01-18 16:37:43,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:43,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:43,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:43,428 INFO L87 Difference]: Start difference. First operand 923 states and 1595 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:44,470 INFO L93 Difference]: Finished difference Result 1325 states and 2248 transitions. [2022-01-18 16:37:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:37:44,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:44,471 INFO L225 Difference]: With dead ends: 1325 [2022-01-18 16:37:44,471 INFO L226 Difference]: Without dead ends: 1305 [2022-01-18 16:37:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=3812, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:37:44,472 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:44,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 256 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:37:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-01-18 16:37:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 944. [2022-01-18 16:37:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.730646871686108) internal successors, (1632), 943 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1632 transitions. [2022-01-18 16:37:44,481 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1632 transitions. Word has length 35 [2022-01-18 16:37:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:44,481 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1632 transitions. [2022-01-18 16:37:44,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1632 transitions. [2022-01-18 16:37:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:44,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:44,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:44,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:44,695 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2011597339, now seen corresponding path program 93 times [2022-01-18 16:37:44,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571168205] [2022-01-18 16:37:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:44,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:44,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571168205] [2022-01-18 16:37:44,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571168205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997060681] [2022-01-18 16:37:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:37:44,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:44,946 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:44,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:37:44,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:37:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 16:37:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:45,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:45,239 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:37:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:45,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:37:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:45,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:45,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:45,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:45,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 26 [2022-01-18 16:37:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:46,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997060681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:46,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:46,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:37:46,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460781202] [2022-01-18 16:37:46,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:46,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:37:46,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:37:46,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:37:46,110 INFO L87 Difference]: Start difference. First operand 944 states and 1632 transitions. Second operand has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 45 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 16:37:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:48,730 INFO L93 Difference]: Finished difference Result 2597 states and 4345 transitions. [2022-01-18 16:37:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 16:37:48,730 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 45 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 35 [2022-01-18 16:37:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:48,733 INFO L225 Difference]: With dead ends: 2597 [2022-01-18 16:37:48,733 INFO L226 Difference]: Without dead ends: 2584 [2022-01-18 16:37:48,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2671, Invalid=12581, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 16:37:48,734 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 464 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:48,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 420 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1006 Invalid, 0 Unknown, 514 Unchecked, 0.5s Time] [2022-01-18 16:37:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-01-18 16:37:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1360. [2022-01-18 16:37:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 1.7468727005150846) internal successors, (2374), 1359 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2374 transitions. [2022-01-18 16:37:48,749 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2374 transitions. Word has length 35 [2022-01-18 16:37:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:48,749 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2374 transitions. [2022-01-18 16:37:48,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 45 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 16:37:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2374 transitions. [2022-01-18 16:37:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:48,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:48,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:48,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:48,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:48,951 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -407887615, now seen corresponding path program 94 times [2022-01-18 16:37:48,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:48,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462931379] [2022-01-18 16:37:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:48,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:49,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462931379] [2022-01-18 16:37:49,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462931379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357731980] [2022-01-18 16:37:49,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:37:49,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:49,188 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:49,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:37:49,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:37:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:37:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:49,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:49,374 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 13 treesize of output 9 [2022-01-18 16:37:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:49,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:49,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:49,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:49,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:49,730 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 30 treesize of output 30 [2022-01-18 16:37:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:49,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357731980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:49,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:49,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:37:49,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319862150] [2022-01-18 16:37:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:49,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:37:49,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:37:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:37:49,875 INFO L87 Difference]: Start difference. First operand 1360 states and 2374 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:51,856 INFO L93 Difference]: Finished difference Result 2446 states and 4129 transitions. [2022-01-18 16:37:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:37:51,857 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:51,859 INFO L225 Difference]: With dead ends: 2446 [2022-01-18 16:37:51,859 INFO L226 Difference]: Without dead ends: 2424 [2022-01-18 16:37:51,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1179, Invalid=8327, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:37:51,861 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:51,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 288 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:37:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-01-18 16:37:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1432. [2022-01-18 16:37:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 1.748427672955975) internal successors, (2502), 1431 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2502 transitions. [2022-01-18 16:37:51,875 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2502 transitions. Word has length 35 [2022-01-18 16:37:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:51,875 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2502 transitions. [2022-01-18 16:37:51,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2502 transitions. [2022-01-18 16:37:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:51,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:51,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:51,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:52,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 16:37:52,077 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 474178109, now seen corresponding path program 95 times [2022-01-18 16:37:52,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879357933] [2022-01-18 16:37:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:52,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:52,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879357933] [2022-01-18 16:37:52,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879357933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350301797] [2022-01-18 16:37:52,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:37:52,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:52,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:52,309 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:52,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:37:52,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:37:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:37:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:52,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:52,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:52,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:52,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:52,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:52,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:37:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350301797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:53,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:53,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 35 [2022-01-18 16:37:53,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557633003] [2022-01-18 16:37:53,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:53,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:37:53,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:37:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:37:53,117 INFO L87 Difference]: Start difference. First operand 1432 states and 2502 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:54,518 INFO L93 Difference]: Finished difference Result 1894 states and 3248 transitions. [2022-01-18 16:37:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:37:54,518 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 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 35 [2022-01-18 16:37:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:54,520 INFO L225 Difference]: With dead ends: 1894 [2022-01-18 16:37:54,520 INFO L226 Difference]: Without dead ends: 1884 [2022-01-18 16:37:54,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=883, Invalid=5923, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:37:54,521 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:54,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 270 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:37:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-01-18 16:37:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1429. [2022-01-18 16:37:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.7478991596638656) internal successors, (2496), 1428 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2496 transitions. [2022-01-18 16:37:54,533 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2496 transitions. Word has length 35 [2022-01-18 16:37:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 2496 transitions. [2022-01-18 16:37:54,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2496 transitions. [2022-01-18 16:37:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:54,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:54,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:54,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:54,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 16:37:54,736 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1619372959, now seen corresponding path program 96 times [2022-01-18 16:37:54,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:54,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592487945] [2022-01-18 16:37:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:54,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:54,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592487945] [2022-01-18 16:37:54,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592487945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047079270] [2022-01-18 16:37:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:37:54,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:54,966 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:37:54,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:37:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:37:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:55,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:37:55,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:37:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:55,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:55,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:55,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:55,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:37:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:37:56,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047079270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:37:56,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:37:56,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:37:56,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121660699] [2022-01-18 16:37:56,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:37:56,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:37:56,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:37:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:37:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:37:56,092 INFO L87 Difference]: Start difference. First operand 1429 states and 2496 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:58,895 INFO L93 Difference]: Finished difference Result 2746 states and 4680 transitions. [2022-01-18 16:37:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 16:37:58,895 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:37:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:58,898 INFO L225 Difference]: With dead ends: 2746 [2022-01-18 16:37:58,898 INFO L226 Difference]: Without dead ends: 2733 [2022-01-18 16:37:58,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4545 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1642, Invalid=13120, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 16:37:58,899 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 553 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:58,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 285 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 706 Invalid, 0 Unknown, 553 Unchecked, 0.3s Time] [2022-01-18 16:37:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-01-18 16:37:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1796. [2022-01-18 16:37:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 1.777158774373259) internal successors, (3190), 1795 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 3190 transitions. [2022-01-18 16:37:58,917 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 3190 transitions. Word has length 35 [2022-01-18 16:37:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:58,917 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 3190 transitions. [2022-01-18 16:37:58,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 3190 transitions. [2022-01-18 16:37:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:37:58,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:58,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:58,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:59,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:59,123 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:37:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash 476828221, now seen corresponding path program 97 times [2022-01-18 16:37:59,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669137954] [2022-01-18 16:37:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:59,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:37:59,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669137954] [2022-01-18 16:37:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669137954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762366865] [2022-01-18 16:37:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:37:59,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:59,360 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:37:59,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:37:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:37:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:59,546 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 9 [2022-01-18 16:37:59,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:37:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:37:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:59,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:59,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:37:59,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:59,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:00,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762366865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:00,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:00,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:38:00,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426846675] [2022-01-18 16:38:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:00,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:38:00,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:38:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:38:00,060 INFO L87 Difference]: Start difference. First operand 1796 states and 3190 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:01,464 INFO L93 Difference]: Finished difference Result 3169 states and 5451 transitions. [2022-01-18 16:38:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:38:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:01,467 INFO L225 Difference]: With dead ends: 3169 [2022-01-18 16:38:01,467 INFO L226 Difference]: Without dead ends: 3143 [2022-01-18 16:38:01,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=772, Invalid=4340, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:38:01,468 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:01,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 274 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2022-01-18 16:38:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 1883. [2022-01-18 16:38:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 1.781615302869288) internal successors, (3353), 1882 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 16:38:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3353 transitions. [2022-01-18 16:38:01,488 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3353 transitions. Word has length 35 [2022-01-18 16:38:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:01,488 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 3353 transitions. [2022-01-18 16:38:01,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3353 transitions. [2022-01-18 16:38:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:01,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:01,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:01,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:01,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:01,690 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1064573543, now seen corresponding path program 98 times [2022-01-18 16:38:01,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965690687] [2022-01-18 16:38:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:01,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:01,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965690687] [2022-01-18 16:38:01,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965690687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:01,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497502914] [2022-01-18 16:38:01,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:38:01,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:01,930 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:01,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:38:01,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:38:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:38:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:02,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:38:02,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:02,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:02,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:02,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:02,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:02,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:02,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497502914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:02,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:38:02,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354376458] [2022-01-18 16:38:02,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:38:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:38:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:38:02,636 INFO L87 Difference]: Start difference. First operand 1883 states and 3353 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:03,868 INFO L93 Difference]: Finished difference Result 3065 states and 5281 transitions. [2022-01-18 16:38:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:38:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:03,871 INFO L225 Difference]: With dead ends: 3065 [2022-01-18 16:38:03,871 INFO L226 Difference]: Without dead ends: 3019 [2022-01-18 16:38:03,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=704, Invalid=4552, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:38:03,872 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 178 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:03,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 208 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2022-01-18 16:38:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 1873. [2022-01-18 16:38:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7751068376068375) internal successors, (3323), 1872 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3323 transitions. [2022-01-18 16:38:03,890 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3323 transitions. Word has length 35 [2022-01-18 16:38:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:03,890 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3323 transitions. [2022-01-18 16:38:03,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3323 transitions. [2022-01-18 16:38:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:03,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:03,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:03,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:04,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 16:38:04,092 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1146189601, now seen corresponding path program 99 times [2022-01-18 16:38:04,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:04,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227543617] [2022-01-18 16:38:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:04,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:04,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:04,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227543617] [2022-01-18 16:38:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227543617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:04,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503159668] [2022-01-18 16:38:04,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:38:04,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:04,320 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:04,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:38:04,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:38:04,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:38:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:04,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:04,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:04,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:38:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:04,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:04,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:04,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:05,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:05,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:38:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503159668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:05,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:05,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-01-18 16:38:05,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514538022] [2022-01-18 16:38:05,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 16:38:05,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 16:38:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:38:05,377 INFO L87 Difference]: Start difference. First operand 1873 states and 3323 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:08,428 INFO L93 Difference]: Finished difference Result 3224 states and 5523 transitions. [2022-01-18 16:38:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 16:38:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:08,432 INFO L225 Difference]: With dead ends: 3224 [2022-01-18 16:38:08,432 INFO L226 Difference]: Without dead ends: 3215 [2022-01-18 16:38:08,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 47 SyntacticMatches, 16 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2142, Invalid=12620, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 16:38:08,433 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 367 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:08,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 395 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 987 Invalid, 0 Unknown, 573 Unchecked, 0.4s Time] [2022-01-18 16:38:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-01-18 16:38:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 1905. [2022-01-18 16:38:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 1.7746848739495797) internal successors, (3379), 1904 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3379 transitions. [2022-01-18 16:38:08,454 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3379 transitions. Word has length 35 [2022-01-18 16:38:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:08,454 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 3379 transitions. [2022-01-18 16:38:08,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3379 transitions. [2022-01-18 16:38:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:08,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:08,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:08,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:08,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:08,657 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -70478445, now seen corresponding path program 100 times [2022-01-18 16:38:08,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258719353] [2022-01-18 16:38:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:08,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:08,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258719353] [2022-01-18 16:38:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258719353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121242205] [2022-01-18 16:38:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:38:08,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:08,892 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:08,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:38:08,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:38:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:38:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:09,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:09,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 9 [2022-01-18 16:38:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:09,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:09,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:09,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:09,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:09,455 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 28 treesize of output 28 [2022-01-18 16:38:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121242205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:09,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-01-18 16:38:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549003463] [2022-01-18 16:38:09,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:38:09,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:38:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:38:09,598 INFO L87 Difference]: Start difference. First operand 1905 states and 3379 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:10,764 INFO L93 Difference]: Finished difference Result 2887 states and 4984 transitions. [2022-01-18 16:38:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:38:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:10,767 INFO L225 Difference]: With dead ends: 2887 [2022-01-18 16:38:10,767 INFO L226 Difference]: Without dead ends: 2865 [2022-01-18 16:38:10,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=648, Invalid=4044, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:38:10,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:10,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 169 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:38:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2022-01-18 16:38:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 1963. [2022-01-18 16:38:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 1.7757390417940877) internal successors, (3484), 1962 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3484 transitions. [2022-01-18 16:38:10,787 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3484 transitions. Word has length 35 [2022-01-18 16:38:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 3484 transitions. [2022-01-18 16:38:10,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3484 transitions. [2022-01-18 16:38:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:10,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:10,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:10,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:10,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 16:38:10,989 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1300751397, now seen corresponding path program 101 times [2022-01-18 16:38:10,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:10,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187417737] [2022-01-18 16:38:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:10,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:11,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187417737] [2022-01-18 16:38:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187417737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221848060] [2022-01-18 16:38:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:38:11,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:11,218 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:11,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 16:38:11,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:38:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:11,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-18 16:38:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:11,796 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:38:11,796 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 74 treesize of output 50 [2022-01-18 16:38:11,875 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:38:11,876 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 48 treesize of output 24 [2022-01-18 16:38:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:11,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:12,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:12,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 144 [2022-01-18 16:38:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:13,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:13,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 219 [2022-01-18 16:38:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221848060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:14,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 56 [2022-01-18 16:38:14,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671696517] [2022-01-18 16:38:14,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:14,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-18 16:38:14,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-18 16:38:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:38:14,306 INFO L87 Difference]: Start difference. First operand 1963 states and 3484 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:21,439 INFO L93 Difference]: Finished difference Result 2460 states and 4273 transitions. [2022-01-18 16:38:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-18 16:38:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:21,442 INFO L225 Difference]: With dead ends: 2460 [2022-01-18 16:38:21,442 INFO L226 Difference]: Without dead ends: 2429 [2022-01-18 16:38:21,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6805 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1833, Invalid=20219, Unknown=0, NotChecked=0, Total=22052 [2022-01-18 16:38:21,444 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 260 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:21,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 404 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:38:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2022-01-18 16:38:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1568. [2022-01-18 16:38:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 1.751754945756222) internal successors, (2745), 1567 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2745 transitions. [2022-01-18 16:38:21,459 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2745 transitions. Word has length 35 [2022-01-18 16:38:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:21,459 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2745 transitions. [2022-01-18 16:38:21,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2745 transitions. [2022-01-18 16:38:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:21,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:21,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:21,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:21,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 16:38:21,661 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1851671161, now seen corresponding path program 102 times [2022-01-18 16:38:21,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:21,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33466281] [2022-01-18 16:38:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:21,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:21,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33466281] [2022-01-18 16:38:21,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33466281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464865121] [2022-01-18 16:38:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:38:21,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:21,935 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:21,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 16:38:21,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 16:38:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:21,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-18 16:38:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:38:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:38:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:38:22,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:38:22,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2022-01-18 16:38:22,750 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 16:38:22,750 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 50 treesize of output 26 [2022-01-18 16:38:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:22,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:24,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:24,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 152 [2022-01-18 16:38:25,464 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 16:38:25,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 173 [2022-01-18 16:38:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464865121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:27,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:27,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-01-18 16:38:27,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092532270] [2022-01-18 16:38:27,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:27,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-18 16:38:27,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-18 16:38:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3003, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 16:38:27,083 INFO L87 Difference]: Start difference. First operand 1568 states and 2745 transitions. Second operand has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:31,917 INFO L93 Difference]: Finished difference Result 2030 states and 3491 transitions. [2022-01-18 16:38:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:38:31,917 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:31,919 INFO L225 Difference]: With dead ends: 2030 [2022-01-18 16:38:31,919 INFO L226 Difference]: Without dead ends: 2020 [2022-01-18 16:38:31,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1675, Invalid=14581, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 16:38:31,920 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:31,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 234 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1061 Invalid, 0 Unknown, 1533 Unchecked, 0.4s Time] [2022-01-18 16:38:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-01-18 16:38:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1571. [2022-01-18 16:38:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 1.7535031847133757) internal successors, (2753), 1570 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2753 transitions. [2022-01-18 16:38:31,934 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2753 transitions. Word has length 35 [2022-01-18 16:38:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:31,934 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 2753 transitions. [2022-01-18 16:38:31,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2753 transitions. [2022-01-18 16:38:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:31,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:31,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:31,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-01-18 16:38:32,135 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1300386523, now seen corresponding path program 103 times [2022-01-18 16:38:32,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:32,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461178238] [2022-01-18 16:38:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:32,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:32,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:32,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461178238] [2022-01-18 16:38:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461178238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:32,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444766634] [2022-01-18 16:38:32,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:38:32,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:32,379 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:32,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 16:38:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:38:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:32,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 9 [2022-01-18 16:38:32,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:32,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:32,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:32,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:32,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:32,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444766634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:33,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:33,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:38:33,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104727787] [2022-01-18 16:38:33,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:33,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:38:33,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:38:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:38:33,096 INFO L87 Difference]: Start difference. First operand 1571 states and 2753 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:34,660 INFO L93 Difference]: Finished difference Result 2696 states and 4581 transitions. [2022-01-18 16:38:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:38:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:34,662 INFO L225 Difference]: With dead ends: 2696 [2022-01-18 16:38:34,662 INFO L226 Difference]: Without dead ends: 2680 [2022-01-18 16:38:34,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=700, Invalid=5620, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:38:34,663 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 144 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:34,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 167 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-01-18 16:38:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1820. [2022-01-18 16:38:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 1.7465640461792193) internal successors, (3177), 1819 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 3177 transitions. [2022-01-18 16:38:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 3177 transitions. Word has length 35 [2022-01-18 16:38:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:34,681 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 3177 transitions. [2022-01-18 16:38:34,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 3177 transitions. [2022-01-18 16:38:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:34,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:34,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:34,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:34,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:34,889 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1855550813, now seen corresponding path program 104 times [2022-01-18 16:38:34,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:34,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318334526] [2022-01-18 16:38:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:34,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:35,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:35,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318334526] [2022-01-18 16:38:35,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318334526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:35,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188894456] [2022-01-18 16:38:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:38:35,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:35,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:35,127 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:35,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 16:38:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:38:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:38:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:35,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:38:35,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:35,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:35,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:35,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:35,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:35,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:35,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188894456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:35,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:35,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:38:35,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66811302] [2022-01-18 16:38:35,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:35,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:38:35,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:38:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:38:35,836 INFO L87 Difference]: Start difference. First operand 1820 states and 3177 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:37,274 INFO L93 Difference]: Finished difference Result 3271 states and 5529 transitions. [2022-01-18 16:38:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:38:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:37,277 INFO L225 Difference]: With dead ends: 3271 [2022-01-18 16:38:37,277 INFO L226 Difference]: Without dead ends: 3248 [2022-01-18 16:38:37,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=765, Invalid=5555, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:38:37,278 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 171 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2022-01-18 16:38:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1812. [2022-01-18 16:38:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 1.7415792379900608) internal successors, (3154), 1811 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3154 transitions. [2022-01-18 16:38:37,297 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3154 transitions. Word has length 35 [2022-01-18 16:38:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:37,297 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 3154 transitions. [2022-01-18 16:38:37,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3154 transitions. [2022-01-18 16:38:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:38:37,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:37,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:37,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:37,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:37,511 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1304364495, now seen corresponding path program 105 times [2022-01-18 16:38:37,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:37,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224158709] [2022-01-18 16:38:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:37,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:37,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224158709] [2022-01-18 16:38:37,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224158709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343310409] [2022-01-18 16:38:37,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:38:37,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:37,754 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:37,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 16:38:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:38:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 16:38:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:38,051 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 11 treesize of output 7 [2022-01-18 16:38:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:38,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:38:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:38,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:38,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:38,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:38,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:38,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 16:38:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343310409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:38,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:38:38,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193959360] [2022-01-18 16:38:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:38,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:38:38,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:38:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:38:38,885 INFO L87 Difference]: Start difference. First operand 1812 states and 3154 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:42,075 INFO L93 Difference]: Finished difference Result 4026 states and 6841 transitions. [2022-01-18 16:38:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 16:38:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 16:38:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:42,079 INFO L225 Difference]: With dead ends: 4026 [2022-01-18 16:38:42,079 INFO L226 Difference]: Without dead ends: 4009 [2022-01-18 16:38:42,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 52 SyntacticMatches, 28 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2484, Invalid=11796, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 16:38:42,080 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 432 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 714 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:42,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 287 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 847 Invalid, 0 Unknown, 714 Unchecked, 0.4s Time] [2022-01-18 16:38:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4009 states. [2022-01-18 16:38:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4009 to 2680. [2022-01-18 16:38:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 1.7487868607689436) internal successors, (4685), 2679 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4685 transitions. [2022-01-18 16:38:42,107 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4685 transitions. Word has length 35 [2022-01-18 16:38:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:42,107 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4685 transitions. [2022-01-18 16:38:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4685 transitions. [2022-01-18 16:38:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:42,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:42,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:42,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 16:38:42,310 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233081, now seen corresponding path program 106 times [2022-01-18 16:38:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142264032] [2022-01-18 16:38:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:42,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:42,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:42,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142264032] [2022-01-18 16:38:42,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142264032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:42,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344401134] [2022-01-18 16:38:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:38:42,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:42,561 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:42,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 16:38:42,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:38:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:38:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:42,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:42,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:42,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:43,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:43,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:43,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:43,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:43,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344401134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:43,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:43,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:38:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840361138] [2022-01-18 16:38:43,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:43,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:38:43,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:38:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:38:43,346 INFO L87 Difference]: Start difference. First operand 2680 states and 4685 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:45,085 INFO L93 Difference]: Finished difference Result 4274 states and 7252 transitions. [2022-01-18 16:38:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:38:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:38:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:45,090 INFO L225 Difference]: With dead ends: 4274 [2022-01-18 16:38:45,090 INFO L226 Difference]: Without dead ends: 4263 [2022-01-18 16:38:45,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=934, Invalid=6548, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:38:45,090 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 186 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:45,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 137 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2022-01-18 16:38:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 2270. [2022-01-18 16:38:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.748788012340238) internal successors, (3968), 2269 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3968 transitions. [2022-01-18 16:38:45,115 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3968 transitions. Word has length 43 [2022-01-18 16:38:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:45,115 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 3968 transitions. [2022-01-18 16:38:45,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3968 transitions. [2022-01-18 16:38:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:45,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:45,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:45,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:45,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:45,318 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash -593167357, now seen corresponding path program 107 times [2022-01-18 16:38:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766889116] [2022-01-18 16:38:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:45,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:45,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766889116] [2022-01-18 16:38:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766889116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649106873] [2022-01-18 16:38:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:38:45,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:45,579 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:38:45,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 16:38:45,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:38:45,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:45,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:38:45,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:45,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:46,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:46,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:46,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:46,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:38:46,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649106873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:46,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:46,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 35 [2022-01-18 16:38:46,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118389790] [2022-01-18 16:38:46,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:46,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 16:38:46,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 16:38:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:38:46,491 INFO L87 Difference]: Start difference. First operand 2270 states and 3968 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 16:38:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:47,305 INFO L93 Difference]: Finished difference Result 2483 states and 4302 transitions. [2022-01-18 16:38:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 16:38:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 43 [2022-01-18 16:38:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:47,308 INFO L225 Difference]: With dead ends: 2483 [2022-01-18 16:38:47,308 INFO L226 Difference]: Without dead ends: 2473 [2022-01-18 16:38:47,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=564, Invalid=2976, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:38:47,308 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 229 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:47,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 149 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:38:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-01-18 16:38:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1986. [2022-01-18 16:38:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.7566750629722923) internal successors, (3487), 1985 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3487 transitions. [2022-01-18 16:38:47,327 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3487 transitions. Word has length 43 [2022-01-18 16:38:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:47,327 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3487 transitions. [2022-01-18 16:38:47,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 16:38:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3487 transitions. [2022-01-18 16:38:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:47,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:47,328 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:47,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:47,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:47,529 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -590517245, now seen corresponding path program 108 times [2022-01-18 16:38:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864394185] [2022-01-18 16:38:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:47,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:47,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864394185] [2022-01-18 16:38:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864394185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701982072] [2022-01-18 16:38:47,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:38:47,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:47,848 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:47,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:38:47,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:38:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:38:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:48,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:48,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:38:48,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:38:48,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:48,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:48,500 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 36 treesize of output 38 [2022-01-18 16:38:48,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:48,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:38:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:38:49,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701982072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:49,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:49,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 44 [2022-01-18 16:38:49,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224828387] [2022-01-18 16:38:49,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:49,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:38:49,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:49,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:38:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:38:49,037 INFO L87 Difference]: Start difference. First operand 1986 states and 3487 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:50,780 INFO L93 Difference]: Finished difference Result 3052 states and 5232 transitions. [2022-01-18 16:38:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:38:50,780 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:38:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:50,784 INFO L225 Difference]: With dead ends: 3052 [2022-01-18 16:38:50,784 INFO L226 Difference]: Without dead ends: 3039 [2022-01-18 16:38:50,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1316, Invalid=8386, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:38:50,785 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:50,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 201 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 691 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-01-18 16:38:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-01-18 16:38:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1976. [2022-01-18 16:38:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 1.749367088607595) internal successors, (3455), 1975 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 3455 transitions. [2022-01-18 16:38:50,807 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 3455 transitions. Word has length 43 [2022-01-18 16:38:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:50,807 INFO L470 AbstractCegarLoop]: Abstraction has 1976 states and 3455 transitions. [2022-01-18 16:38:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 3455 transitions. [2022-01-18 16:38:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:50,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:50,809 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:50,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:51,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:51,010 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2771923, now seen corresponding path program 109 times [2022-01-18 16:38:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531921135] [2022-01-18 16:38:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:51,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:38:51,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:51,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531921135] [2022-01-18 16:38:51,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531921135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:51,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407442579] [2022-01-18 16:38:51,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:38:51,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:51,290 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:51,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:38:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:38:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:51,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:51,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:38:51,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:51,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:51,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:51,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:51,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:38:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407442579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:52,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:52,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 33 [2022-01-18 16:38:52,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663410893] [2022-01-18 16:38:52,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:52,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:38:52,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:38:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:38:52,137 INFO L87 Difference]: Start difference. First operand 1976 states and 3455 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:53,529 INFO L93 Difference]: Finished difference Result 3635 states and 6124 transitions. [2022-01-18 16:38:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:38:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 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 43 [2022-01-18 16:38:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:53,534 INFO L225 Difference]: With dead ends: 3635 [2022-01-18 16:38:53,534 INFO L226 Difference]: Without dead ends: 3615 [2022-01-18 16:38:53,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=881, Invalid=6429, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:38:53,535 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:53,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 200 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:38:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2022-01-18 16:38:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 1874. [2022-01-18 16:38:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 1.7501334757074212) internal successors, (3278), 1873 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 3278 transitions. [2022-01-18 16:38:53,555 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 3278 transitions. Word has length 43 [2022-01-18 16:38:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:53,555 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 3278 transitions. [2022-01-18 16:38:53,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 3278 transitions. [2022-01-18 16:38:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:53,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:53,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:53,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 16:38:53,762 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1319802169, now seen corresponding path program 110 times [2022-01-18 16:38:53,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846418015] [2022-01-18 16:38:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:53,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:54,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846418015] [2022-01-18 16:38:54,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846418015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9629791] [2022-01-18 16:38:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:38:54,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:54,043 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:54,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 16:38:54,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:38:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:38:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:54,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:54,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:38:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:54,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:54,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:54,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:54,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:54,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:38:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-18 16:38:54,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9629791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:54,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:54,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:38:54,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365044753] [2022-01-18 16:38:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:38:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:38:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:38:54,855 INFO L87 Difference]: Start difference. First operand 1874 states and 3278 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:55,680 INFO L93 Difference]: Finished difference Result 1947 states and 3386 transitions. [2022-01-18 16:38:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:38:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:38:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:55,683 INFO L225 Difference]: With dead ends: 1947 [2022-01-18 16:38:55,683 INFO L226 Difference]: Without dead ends: 1934 [2022-01-18 16:38:55,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 33 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:38:55,683 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:55,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 190 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:38:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2022-01-18 16:38:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 387. [2022-01-18 16:38:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.7357512953367875) internal successors, (670), 386 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 670 transitions. [2022-01-18 16:38:55,691 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 670 transitions. Word has length 43 [2022-01-18 16:38:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 670 transitions. [2022-01-18 16:38:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 670 transitions. [2022-01-18 16:38:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:38:55,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:55,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:55,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:55,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 16:38:55,892 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:38:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1752931971, now seen corresponding path program 111 times [2022-01-18 16:38:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68815806] [2022-01-18 16:38:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:55,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:38:56,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68815806] [2022-01-18 16:38:56,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68815806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055198732] [2022-01-18 16:38:56,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:38:56,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:56,154 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:38:56,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 16:38:56,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:38:56,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:38:56,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:56,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:56,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:38:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:56,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:38:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:38:56,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:56,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:56,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:38:57,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:57,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 16:38:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:38:57,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055198732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:57,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:57,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 16:38:57,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477082322] [2022-01-18 16:38:57,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:57,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:38:57,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:38:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:38:57,448 INFO L87 Difference]: Start difference. First operand 387 states and 670 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:01,330 INFO L93 Difference]: Finished difference Result 1818 states and 3019 transitions. [2022-01-18 16:39:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 16:39:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:01,332 INFO L225 Difference]: With dead ends: 1818 [2022-01-18 16:39:01,333 INFO L226 Difference]: Without dead ends: 1800 [2022-01-18 16:39:01,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 28 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8832 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4245, Invalid=19935, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 16:39:01,334 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 382 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:01,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 235 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 838 Invalid, 0 Unknown, 589 Unchecked, 0.4s Time] [2022-01-18 16:39:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-01-18 16:39:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 532. [2022-01-18 16:39:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.734463276836158) internal successors, (921), 531 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 921 transitions. [2022-01-18 16:39:01,341 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 921 transitions. Word has length 43 [2022-01-18 16:39:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:01,341 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 921 transitions. [2022-01-18 16:39:01,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 921 transitions. [2022-01-18 16:39:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:01,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:01,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:01,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:01,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 16:39:01,543 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1466324169, now seen corresponding path program 112 times [2022-01-18 16:39:01,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616359800] [2022-01-18 16:39:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:01,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:39:01,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616359800] [2022-01-18 16:39:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616359800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:01,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471704138] [2022-01-18 16:39:01,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:39:01,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:01,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:01,800 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:01,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 16:39:01,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:39:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:39:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:02,020 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 13 treesize of output 9 [2022-01-18 16:39:02,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:39:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:39:02,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:02,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:02,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:39:02,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:02,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:39:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-18 16:39:02,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471704138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:02,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:02,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:39:02,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445520140] [2022-01-18 16:39:02,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:02,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:39:02,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:39:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:39:02,589 INFO L87 Difference]: Start difference. First operand 532 states and 921 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:03,953 INFO L93 Difference]: Finished difference Result 1320 states and 2186 transitions. [2022-01-18 16:39:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:39:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:03,955 INFO L225 Difference]: With dead ends: 1320 [2022-01-18 16:39:03,955 INFO L226 Difference]: Without dead ends: 1300 [2022-01-18 16:39:03,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=747, Invalid=5415, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:39:03,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:03,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 149 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:39:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-18 16:39:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 302. [2022-01-18 16:39:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.744186046511628) internal successors, (525), 301 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 525 transitions. [2022-01-18 16:39:03,961 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 525 transitions. Word has length 43 [2022-01-18 16:39:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:03,961 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 525 transitions. [2022-01-18 16:39:03,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 525 transitions. [2022-01-18 16:39:03,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:03,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:03,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:03,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:04,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 16:39:04,162 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:04,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:04,162 INFO L85 PathProgramCache]: Analyzing trace with hash -770004281, now seen corresponding path program 113 times [2022-01-18 16:39:04,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767743834] [2022-01-18 16:39:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:04,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:04,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767743834] [2022-01-18 16:39:04,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767743834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538120019] [2022-01-18 16:39:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:39:04,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:04,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:04,438 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:04,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 16:39:04,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:39:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:39:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:04,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:39:04,716 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 13 treesize of output 9 [2022-01-18 16:39:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:04,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:04,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:04,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:39:05,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:05,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:39:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:05,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538120019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:05,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:05,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 38 [2022-01-18 16:39:05,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726911809] [2022-01-18 16:39:05,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:05,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:39:05,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:05,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:39:05,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:39:05,442 INFO L87 Difference]: Start difference. First operand 302 states and 525 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 16:39:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:06,895 INFO L93 Difference]: Finished difference Result 611 states and 1038 transitions. [2022-01-18 16:39:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:39:06,895 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 43 [2022-01-18 16:39:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:06,896 INFO L225 Difference]: With dead ends: 611 [2022-01-18 16:39:06,896 INFO L226 Difference]: Without dead ends: 598 [2022-01-18 16:39:06,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 20 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=991, Invalid=5981, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:39:06,897 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 281 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:06,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 172 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:39:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-18 16:39:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 334. [2022-01-18 16:39:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.7657657657657657) internal successors, (588), 333 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 588 transitions. [2022-01-18 16:39:06,900 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 588 transitions. Word has length 43 [2022-01-18 16:39:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:06,900 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 588 transitions. [2022-01-18 16:39:06,900 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 16:39:06,900 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 588 transitions. [2022-01-18 16:39:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:06,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:06,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:06,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 16:39:07,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:07,101 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash -358595679, now seen corresponding path program 114 times [2022-01-18 16:39:07,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326104961] [2022-01-18 16:39:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:07,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:07,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326104961] [2022-01-18 16:39:07,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326104961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319091434] [2022-01-18 16:39:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:39:07,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:07,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:07,366 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:07,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 16:39:07,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 16:39:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:39:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:07,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-18 16:39:07,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:39:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:07,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:07,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:07,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:39:07,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:07,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:39:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319091434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:08,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:08,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-01-18 16:39:08,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026601764] [2022-01-18 16:39:08,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:08,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:39:08,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:39:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:39:08,180 INFO L87 Difference]: Start difference. First operand 334 states and 588 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:09,317 INFO L93 Difference]: Finished difference Result 688 states and 1161 transitions. [2022-01-18 16:39:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:39:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:09,318 INFO L225 Difference]: With dead ends: 688 [2022-01-18 16:39:09,318 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 16:39:09,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 55 SyntacticMatches, 25 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=4121, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:39:09,318 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:09,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 168 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:39:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 16:39:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 367. [2022-01-18 16:39:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.7622950819672132) internal successors, (645), 366 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 645 transitions. [2022-01-18 16:39:09,322 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 645 transitions. Word has length 43 [2022-01-18 16:39:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:09,322 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 645 transitions. [2022-01-18 16:39:09,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 645 transitions. [2022-01-18 16:39:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:09,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:09,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:09,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:09,524 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 699806765, now seen corresponding path program 115 times [2022-01-18 16:39:09,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615192591] [2022-01-18 16:39:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:09,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615192591] [2022-01-18 16:39:09,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615192591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45806451] [2022-01-18 16:39:09,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:39:09,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:09,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:09,794 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:09,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 16:39:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:39:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:10,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:39:10,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:39:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:10,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:10,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:10,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:39:10,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:10,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:39:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:10,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45806451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:10,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:10,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-01-18 16:39:10,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448591624] [2022-01-18 16:39:10,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:39:10,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:39:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:39:10,577 INFO L87 Difference]: Start difference. First operand 367 states and 645 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:12,011 INFO L93 Difference]: Finished difference Result 980 states and 1642 transitions. [2022-01-18 16:39:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:39:12,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:12,012 INFO L225 Difference]: With dead ends: 980 [2022-01-18 16:39:12,012 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 16:39:12,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 25 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=739, Invalid=5581, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:39:12,013 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:12,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 196 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:39:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 16:39:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 486. [2022-01-18 16:39:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.7443298969072165) internal successors, (846), 485 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 16:39:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 846 transitions. [2022-01-18 16:39:12,018 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 846 transitions. Word has length 43 [2022-01-18 16:39:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:12,018 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 846 transitions. [2022-01-18 16:39:12,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 846 transitions. [2022-01-18 16:39:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:12,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:12,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:12,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:12,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 16:39:12,220 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 998406505, now seen corresponding path program 116 times [2022-01-18 16:39:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282595925] [2022-01-18 16:39:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:12,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:39:12,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282595925] [2022-01-18 16:39:12,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282595925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:12,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147572397] [2022-01-18 16:39:12,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:39:12,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:12,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:12,497 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:12,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 16:39:12,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:39:12,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:39:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:12,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:39:12,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:39:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:39:12,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:12,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:12,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:39:13,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:13,042 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 43 treesize of output 43 [2022-01-18 16:39:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:39:13,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147572397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:13,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:13,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-01-18 16:39:13,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035450795] [2022-01-18 16:39:13,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:13,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:39:13,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:39:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:39:13,310 INFO L87 Difference]: Start difference. First operand 486 states and 846 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:14,320 INFO L93 Difference]: Finished difference Result 1093 states and 1855 transitions. [2022-01-18 16:39:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:39:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:14,321 INFO L225 Difference]: With dead ends: 1093 [2022-01-18 16:39:14,321 INFO L226 Difference]: Without dead ends: 1080 [2022-01-18 16:39:14,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:39:14,321 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:14,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 171 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:39:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-18 16:39:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 540. [2022-01-18 16:39:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.7551020408163265) internal successors, (946), 539 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 946 transitions. [2022-01-18 16:39:14,327 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 946 transitions. Word has length 43 [2022-01-18 16:39:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:14,327 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 946 transitions. [2022-01-18 16:39:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 946 transitions. [2022-01-18 16:39:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:14,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:14,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:14,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:14,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:14,528 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:39:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1353425349, now seen corresponding path program 117 times [2022-01-18 16:39:14,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198116571] [2022-01-18 16:39:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:14,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:39:14,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:14,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198116571] [2022-01-18 16:39:14,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198116571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:14,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573783046] [2022-01-18 16:39:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:39:14,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:14,827 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:39:14,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 16:39:14,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:39:14,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-18 16:39:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:15,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 66 [2022-01-18 16:39:16,050 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-18 16:39:16,051 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 52 treesize of output 24 [2022-01-18 16:39:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:19,747 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-01-18 16:39:19,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 236 [2022-01-18 16:39:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:29,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:29,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 229 treesize of output 265 [2022-01-18 16:39:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573783046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:47,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 69 [2022-01-18 16:39:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208317297] [2022-01-18 16:39:47,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-18 16:39:47,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-18 16:39:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=4379, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:39:47,946 INFO L87 Difference]: Start difference. First operand 540 states and 946 transitions. Second operand has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:59,978 INFO L93 Difference]: Finished difference Result 1675 states and 2829 transitions. [2022-01-18 16:39:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-18 16:39:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:39:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:59,980 INFO L225 Difference]: With dead ends: 1675 [2022-01-18 16:39:59,980 INFO L226 Difference]: Without dead ends: 1617 [2022-01-18 16:39:59,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13601 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=3191, Invalid=37815, Unknown=0, NotChecked=0, Total=41006 [2022-01-18 16:39:59,982 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 401 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 5787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2638 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:59,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 652 Invalid, 5787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2841 Invalid, 0 Unknown, 2638 Unchecked, 1.2s Time] [2022-01-18 16:39:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-01-18 16:39:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 960. [2022-01-18 16:39:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.7768508863399375) internal successors, (1704), 959 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1704 transitions. [2022-01-18 16:39:59,991 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1704 transitions. Word has length 43 [2022-01-18 16:39:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:59,991 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1704 transitions. [2022-01-18 16:39:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1704 transitions. [2022-01-18 16:39:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:39:59,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:59,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:00,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:00,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:00,192 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash 780688251, now seen corresponding path program 118 times [2022-01-18 16:40:00,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811676818] [2022-01-18 16:40:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:00,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:00,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:00,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811676818] [2022-01-18 16:40:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811676818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:00,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466713887] [2022-01-18 16:40:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:00,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:00,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:00,475 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 16:40:00,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:00,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:00,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:00,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:01,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:01,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:01,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:01,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:01,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466713887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:01,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:01,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:01,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749415130] [2022-01-18 16:40:01,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:01,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:01,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:01,349 INFO L87 Difference]: Start difference. First operand 960 states and 1704 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:02,359 INFO L93 Difference]: Finished difference Result 1527 states and 2688 transitions. [2022-01-18 16:40:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 16:40:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:02,360 INFO L225 Difference]: With dead ends: 1527 [2022-01-18 16:40:02,360 INFO L226 Difference]: Without dead ends: 1514 [2022-01-18 16:40:02,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=3501, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 16:40:02,361 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:02,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 209 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-01-18 16:40:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 896. [2022-01-18 16:40:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.7664804469273743) internal successors, (1581), 895 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1581 transitions. [2022-01-18 16:40:02,369 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1581 transitions. Word has length 43 [2022-01-18 16:40:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:02,370 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1581 transitions. [2022-01-18 16:40:02,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1581 transitions. [2022-01-18 16:40:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:02,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:02,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:02,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 16:40:02,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:02,571 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -80491641, now seen corresponding path program 119 times [2022-01-18 16:40:02,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:02,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621933084] [2022-01-18 16:40:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:02,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:02,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621933084] [2022-01-18 16:40:02,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621933084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035091991] [2022-01-18 16:40:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:02,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:02,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:02,847 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 16:40:02,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:40:02,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:03,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:03,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:03,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:03,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:03,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:03,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:03,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-01-18 16:40:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:03,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035091991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:03,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:03,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-01-18 16:40:03,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937837097] [2022-01-18 16:40:03,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:40:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:40:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:40:03,725 INFO L87 Difference]: Start difference. First operand 896 states and 1581 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:04,667 INFO L93 Difference]: Finished difference Result 1292 states and 2255 transitions. [2022-01-18 16:40:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:40:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:04,668 INFO L225 Difference]: With dead ends: 1292 [2022-01-18 16:40:04,668 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 16:40:04,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 56 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=376, Invalid=3284, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:40:04,669 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:04,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 164 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:40:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 16:40:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 903. [2022-01-18 16:40:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.7671840354767183) internal successors, (1594), 902 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1594 transitions. [2022-01-18 16:40:04,678 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1594 transitions. Word has length 43 [2022-01-18 16:40:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:04,678 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1594 transitions. [2022-01-18 16:40:04,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1594 transitions. [2022-01-18 16:40:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:04,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:04,679 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:04,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:04,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:04,879 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash -997351801, now seen corresponding path program 120 times [2022-01-18 16:40:04,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056677086] [2022-01-18 16:40:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:04,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:05,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056677086] [2022-01-18 16:40:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056677086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716513678] [2022-01-18 16:40:05,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:05,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:05,179 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:05,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 16:40:05,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:40:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:40:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:05,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:40:05,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:05,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:05,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:05,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:05,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:05,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:06,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716513678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:06,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:06,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-01-18 16:40:06,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240588084] [2022-01-18 16:40:06,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:06,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:40:06,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:40:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:40:06,408 INFO L87 Difference]: Start difference. First operand 903 states and 1594 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:07,709 INFO L93 Difference]: Finished difference Result 1271 states and 2245 transitions. [2022-01-18 16:40:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 16:40:07,709 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:07,710 INFO L225 Difference]: With dead ends: 1271 [2022-01-18 16:40:07,710 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 16:40:07,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=915, Invalid=5565, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:40:07,711 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:07,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 201 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1028 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-01-18 16:40:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 16:40:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 901. [2022-01-18 16:40:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.7644444444444445) internal successors, (1588), 900 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1588 transitions. [2022-01-18 16:40:07,719 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1588 transitions. Word has length 43 [2022-01-18 16:40:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:07,719 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1588 transitions. [2022-01-18 16:40:07,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1588 transitions. [2022-01-18 16:40:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:07,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:07,720 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:07,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 16:40:07,921 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -115286077, now seen corresponding path program 121 times [2022-01-18 16:40:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375467442] [2022-01-18 16:40:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:07,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:08,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:08,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375467442] [2022-01-18 16:40:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375467442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:08,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552034407] [2022-01-18 16:40:08,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:08,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:08,193 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:08,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 16:40:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:08,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:08,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:08,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:08,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:08,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:08,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:08,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:09,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552034407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:09,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:09,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:09,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111704861] [2022-01-18 16:40:09,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:09,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:09,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:09,008 INFO L87 Difference]: Start difference. First operand 901 states and 1588 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:10,317 INFO L93 Difference]: Finished difference Result 1322 states and 2323 transitions. [2022-01-18 16:40:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:40:10,318 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:10,319 INFO L225 Difference]: With dead ends: 1322 [2022-01-18 16:40:10,319 INFO L226 Difference]: Without dead ends: 1306 [2022-01-18 16:40:10,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=604, Invalid=4226, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:40:10,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:10,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 158 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-01-18 16:40:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 899. [2022-01-18 16:40:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.7628062360801782) internal successors, (1583), 898 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1583 transitions. [2022-01-18 16:40:10,328 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1583 transitions. Word has length 43 [2022-01-18 16:40:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:10,329 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1583 transitions. [2022-01-18 16:40:10,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1583 transitions. [2022-01-18 16:40:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:10,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:10,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:10,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:10,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 16:40:10,531 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:10,531 INFO L85 PathProgramCache]: Analyzing trace with hash 472459245, now seen corresponding path program 122 times [2022-01-18 16:40:10,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:10,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608495358] [2022-01-18 16:40:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:10,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:10,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:10,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608495358] [2022-01-18 16:40:10,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608495358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:10,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608593816] [2022-01-18 16:40:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:10,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:10,815 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:10,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 16:40:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:11,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:11,051 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 13 treesize of output 9 [2022-01-18 16:40:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:11,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:11,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:11,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:11,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:11,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:11,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608593816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:11,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:11,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:11,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895539891] [2022-01-18 16:40:11,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:11,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:11,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:11,641 INFO L87 Difference]: Start difference. First operand 899 states and 1583 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:13,109 INFO L93 Difference]: Finished difference Result 1688 states and 2914 transitions. [2022-01-18 16:40:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:40:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:13,111 INFO L225 Difference]: With dead ends: 1688 [2022-01-18 16:40:13,111 INFO L226 Difference]: Without dead ends: 1665 [2022-01-18 16:40:13,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=5313, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:40:13,112 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:13,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-01-18 16:40:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 896. [2022-01-18 16:40:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.7620111731843575) internal successors, (1577), 895 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1577 transitions. [2022-01-18 16:40:13,121 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1577 transitions. Word has length 43 [2022-01-18 16:40:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1577 transitions. [2022-01-18 16:40:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1577 transitions. [2022-01-18 16:40:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:13,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:13,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:13,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:13,335 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1738303899, now seen corresponding path program 123 times [2022-01-18 16:40:13,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:13,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354306192] [2022-01-18 16:40:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:13,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:13,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354306192] [2022-01-18 16:40:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354306192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194599343] [2022-01-18 16:40:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:13,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:13,622 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:13,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 16:40:13,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 16:40:13,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:40:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:13,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:13,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:13,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:40:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:14,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:14,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:14,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:14,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:14,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194599343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:14,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:14,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:40:14,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488561682] [2022-01-18 16:40:14,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:14,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:40:14,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:40:14,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:40:14,889 INFO L87 Difference]: Start difference. First operand 896 states and 1577 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:16,711 INFO L93 Difference]: Finished difference Result 2428 states and 4159 transitions. [2022-01-18 16:40:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:40:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:16,714 INFO L225 Difference]: With dead ends: 2428 [2022-01-18 16:40:16,714 INFO L226 Difference]: Without dead ends: 2417 [2022-01-18 16:40:16,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1418, Invalid=9294, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 16:40:16,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:16,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 327 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1098 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-01-18 16:40:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-18 16:40:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1482. [2022-01-18 16:40:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 1.7670492910195814) internal successors, (2617), 1481 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2617 transitions. [2022-01-18 16:40:16,729 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2617 transitions. Word has length 43 [2022-01-18 16:40:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:16,729 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 2617 transitions. [2022-01-18 16:40:16,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2617 transitions. [2022-01-18 16:40:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:16,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:16,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:16,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:16,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 16:40:16,931 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1019244167, now seen corresponding path program 124 times [2022-01-18 16:40:16,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:16,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823927608] [2022-01-18 16:40:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:16,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:17,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:17,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823927608] [2022-01-18 16:40:17,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823927608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:17,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261086494] [2022-01-18 16:40:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:17,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:17,208 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:17,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 16:40:17,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:17,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:17,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:17,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:17,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:17,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:17,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261086494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:18,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:18,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:18,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538992754] [2022-01-18 16:40:18,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:18,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:18,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:18,031 INFO L87 Difference]: Start difference. First operand 1482 states and 2617 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:19,944 INFO L93 Difference]: Finished difference Result 2939 states and 5090 transitions. [2022-01-18 16:40:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:40:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:19,947 INFO L225 Difference]: With dead ends: 2939 [2022-01-18 16:40:19,947 INFO L226 Difference]: Without dead ends: 2926 [2022-01-18 16:40:19,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=883, Invalid=7307, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:40:19,948 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:19,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 238 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:40:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-01-18 16:40:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1922. [2022-01-18 16:40:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 1.7850078084331078) internal successors, (3429), 1921 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 3429 transitions. [2022-01-18 16:40:19,967 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 3429 transitions. Word has length 43 [2022-01-18 16:40:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 3429 transitions. [2022-01-18 16:40:19,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 3429 transitions. [2022-01-18 16:40:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:19,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:19,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:19,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:20,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 16:40:20,170 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1901309891, now seen corresponding path program 125 times [2022-01-18 16:40:20,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702828881] [2022-01-18 16:40:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:20,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702828881] [2022-01-18 16:40:20,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702828881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060322877] [2022-01-18 16:40:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:20,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:20,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:20,460 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 16:40:20,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 16:40:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:20,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:20,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:20,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:20,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:20,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:21,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:21,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060322877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:21,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:21,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:21,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912960590] [2022-01-18 16:40:21,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:21,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:21,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:21,285 INFO L87 Difference]: Start difference. First operand 1922 states and 3429 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:22,540 INFO L93 Difference]: Finished difference Result 2679 states and 4696 transitions. [2022-01-18 16:40:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:40:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:22,544 INFO L225 Difference]: With dead ends: 2679 [2022-01-18 16:40:22,544 INFO L226 Difference]: Without dead ends: 2663 [2022-01-18 16:40:22,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:40:22,546 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:22,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 145 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-01-18 16:40:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 970. [2022-01-18 16:40:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.7564499484004128) internal successors, (1702), 969 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1702 transitions. [2022-01-18 16:40:22,564 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1702 transitions. Word has length 43 [2022-01-18 16:40:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:22,564 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1702 transitions. [2022-01-18 16:40:22,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1702 transitions. [2022-01-18 16:40:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:22,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:22,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:22,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 16:40:22,768 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1248462555, now seen corresponding path program 126 times [2022-01-18 16:40:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:22,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734691406] [2022-01-18 16:40:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:22,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:23,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734691406] [2022-01-18 16:40:23,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734691406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344757057] [2022-01-18 16:40:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:23,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:23,036 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:23,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 16:40:23,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 16:40:23,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:23,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:40:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:23,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:23,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:23,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:40:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:23,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:23,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:23,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:23,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344757057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:24,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-01-18 16:40:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489053838] [2022-01-18 16:40:24,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:24,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-18 16:40:24,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-18 16:40:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 16:40:24,404 INFO L87 Difference]: Start difference. First operand 970 states and 1702 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:25,856 INFO L93 Difference]: Finished difference Result 1309 states and 2226 transitions. [2022-01-18 16:40:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 16:40:25,856 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:25,857 INFO L225 Difference]: With dead ends: 1309 [2022-01-18 16:40:25,857 INFO L226 Difference]: Without dead ends: 1296 [2022-01-18 16:40:25,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=834, Invalid=6306, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:40:25,858 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:25,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 300 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1257 Invalid, 0 Unknown, 223 Unchecked, 0.5s Time] [2022-01-18 16:40:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-01-18 16:40:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 800. [2022-01-18 16:40:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.7446808510638299) internal successors, (1394), 799 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1394 transitions. [2022-01-18 16:40:25,866 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1394 transitions. Word has length 43 [2022-01-18 16:40:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1394 transitions. [2022-01-18 16:40:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1394 transitions. [2022-01-18 16:40:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:25,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:25,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:25,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:26,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 16:40:26,083 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1021894279, now seen corresponding path program 127 times [2022-01-18 16:40:26,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860897070] [2022-01-18 16:40:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:26,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860897070] [2022-01-18 16:40:26,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860897070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844230972] [2022-01-18 16:40:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:26,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:26,370 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:26,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 16:40:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:26,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:26,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:26,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:26,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:26,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:27,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:27,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844230972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:27,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:27,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:27,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30139773] [2022-01-18 16:40:27,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:27,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:27,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:27,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:27,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:27,228 INFO L87 Difference]: Start difference. First operand 800 states and 1394 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:28,465 INFO L93 Difference]: Finished difference Result 1135 states and 1934 transitions. [2022-01-18 16:40:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:40:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:28,466 INFO L225 Difference]: With dead ends: 1135 [2022-01-18 16:40:28,466 INFO L226 Difference]: Without dead ends: 1122 [2022-01-18 16:40:28,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 54 SyntacticMatches, 25 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=598, Invalid=4094, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:40:28,467 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:28,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 139 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-18 16:40:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 789. [2022-01-18 16:40:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.7208121827411167) internal successors, (1356), 788 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1356 transitions. [2022-01-18 16:40:28,474 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1356 transitions. Word has length 43 [2022-01-18 16:40:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:28,474 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1356 transitions. [2022-01-18 16:40:28,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1356 transitions. [2022-01-18 16:40:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:28,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:28,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:28,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:28,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:28,679 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1433302881, now seen corresponding path program 128 times [2022-01-18 16:40:28,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465728724] [2022-01-18 16:40:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:28,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:28,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465728724] [2022-01-18 16:40:28,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465728724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276518308] [2022-01-18 16:40:28,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:40:28,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:28,957 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 16:40:28,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:40:28,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:40:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:29,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:29,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:29,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:29,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:29,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:29,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:29,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276518308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:29,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:29,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-01-18 16:40:29,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780726641] [2022-01-18 16:40:29,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:29,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:40:29,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:40:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:40:29,833 INFO L87 Difference]: Start difference. First operand 789 states and 1356 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:31,232 INFO L93 Difference]: Finished difference Result 1537 states and 2583 transitions. [2022-01-18 16:40:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:40:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:31,233 INFO L225 Difference]: With dead ends: 1537 [2022-01-18 16:40:31,234 INFO L226 Difference]: Without dead ends: 1518 [2022-01-18 16:40:31,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 25 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=486, Invalid=4916, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:40:31,234 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:31,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 204 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:40:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-01-18 16:40:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 517. [2022-01-18 16:40:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.7131782945736433) internal successors, (884), 516 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 884 transitions. [2022-01-18 16:40:31,241 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 884 transitions. Word has length 43 [2022-01-18 16:40:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:31,241 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 884 transitions. [2022-01-18 16:40:31,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 884 transitions. [2022-01-18 16:40:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:31,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:31,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:31,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 16:40:31,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:31,442 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1803261971, now seen corresponding path program 129 times [2022-01-18 16:40:31,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314791905] [2022-01-18 16:40:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:31,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:31,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314791905] [2022-01-18 16:40:31,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314791905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960184736] [2022-01-18 16:40:31,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:40:31,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:31,738 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:31,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 16:40:31,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:40:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:40:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:32,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:40:32,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:40:32,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:32,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:32,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:32,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:32,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:32,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-01-18 16:40:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:33,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960184736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:33,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:33,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-01-18 16:40:33,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482533064] [2022-01-18 16:40:33,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:33,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 16:40:33,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 16:40:33,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:40:33,036 INFO L87 Difference]: Start difference. First operand 517 states and 884 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:34,507 INFO L93 Difference]: Finished difference Result 1097 states and 1868 transitions. [2022-01-18 16:40:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:40:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:34,508 INFO L225 Difference]: With dead ends: 1097 [2022-01-18 16:40:34,508 INFO L226 Difference]: Without dead ends: 1074 [2022-01-18 16:40:34,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 59 SyntacticMatches, 15 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1233, Invalid=7139, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:40:34,510 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 225 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:34,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 173 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 787 Invalid, 0 Unknown, 284 Unchecked, 0.3s Time] [2022-01-18 16:40:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-18 16:40:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 513. [2022-01-18 16:40:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.7109375) internal successors, (876), 512 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 876 transitions. [2022-01-18 16:40:34,515 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 876 transitions. Word has length 43 [2022-01-18 16:40:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 876 transitions. [2022-01-18 16:40:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 876 transitions. [2022-01-18 16:40:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:34,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:34,516 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:34,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 16:40:34,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-01-18 16:40:34,716 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1163007905, now seen corresponding path program 130 times [2022-01-18 16:40:34,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:34,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358494108] [2022-01-18 16:40:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:34,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:34,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358494108] [2022-01-18 16:40:34,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358494108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142629557] [2022-01-18 16:40:34,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:40:34,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:34,997 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:34,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 16:40:35,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:40:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:40:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:35,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:35,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-18 16:40:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:35,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:35,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:35,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:35,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:35,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 16:40:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:35,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142629557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:35,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:35,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:35,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310730748] [2022-01-18 16:40:35,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:35,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:35,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:35,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:35,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:35,838 INFO L87 Difference]: Start difference. First operand 513 states and 876 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:37,259 INFO L93 Difference]: Finished difference Result 1550 states and 2619 transitions. [2022-01-18 16:40:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:40:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:37,261 INFO L225 Difference]: With dead ends: 1550 [2022-01-18 16:40:37,261 INFO L226 Difference]: Without dead ends: 1527 [2022-01-18 16:40:37,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 54 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=5439, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:40:37,262 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:37,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 119 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:40:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-01-18 16:40:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 599. [2022-01-18 16:40:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.7023411371237458) internal successors, (1018), 598 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1018 transitions. [2022-01-18 16:40:37,269 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1018 transitions. Word has length 43 [2022-01-18 16:40:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1018 transitions. [2022-01-18 16:40:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1018 transitions. [2022-01-18 16:40:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:37,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:37,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:37,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:37,483 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1167134781, now seen corresponding path program 131 times [2022-01-18 16:40:37,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321540259] [2022-01-18 16:40:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:37,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:40:37,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321540259] [2022-01-18 16:40:37,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321540259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362697746] [2022-01-18 16:40:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:40:37,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:37,774 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:37,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 16:40:37,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 16:40:37,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:40:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:38,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:38,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:40:38,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:38,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:38,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:38,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:38,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:40:38,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362697746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:38,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 36 [2022-01-18 16:40:38,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155321704] [2022-01-18 16:40:38,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:38,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:40:38,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:40:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:40:38,751 INFO L87 Difference]: Start difference. First operand 599 states and 1018 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:39,851 INFO L93 Difference]: Finished difference Result 1001 states and 1713 transitions. [2022-01-18 16:40:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:40:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:39,852 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 16:40:39,852 INFO L226 Difference]: Without dead ends: 991 [2022-01-18 16:40:39,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=635, Invalid=4057, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:40:39,853 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:39,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 128 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:40:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-18 16:40:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 469. [2022-01-18 16:40:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.7008547008547008) internal successors, (796), 468 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 796 transitions. [2022-01-18 16:40:39,861 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 796 transitions. Word has length 43 [2022-01-18 16:40:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:39,861 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 796 transitions. [2022-01-18 16:40:39,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 796 transitions. [2022-01-18 16:40:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-18 16:40:39,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:39,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:39,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:40,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:40,062 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1612656009, now seen corresponding path program 132 times [2022-01-18 16:40:40,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922978454] [2022-01-18 16:40:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:40,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:40:40,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922978454] [2022-01-18 16:40:40,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922978454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233450390] [2022-01-18 16:40:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:40:40,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:40,342 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 16:40:40,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 16:40:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:40:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 16:40:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:40,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:40,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-18 16:40:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:40:40,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:40,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:40,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:40,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:40,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:40:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233450390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:41,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:41,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-01-18 16:40:41,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507911340] [2022-01-18 16:40:41,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:41,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 16:40:41,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 16:40:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:40:41,263 INFO L87 Difference]: Start difference. First operand 469 states and 796 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:42,192 INFO L93 Difference]: Finished difference Result 968 states and 1622 transitions. [2022-01-18 16:40:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:40:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-18 16:40:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:42,193 INFO L225 Difference]: With dead ends: 968 [2022-01-18 16:40:42,193 INFO L226 Difference]: Without dead ends: 952 [2022-01-18 16:40:42,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=368, Invalid=3414, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:40:42,194 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:42,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 107 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:40:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-18 16:40:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 222. [2022-01-18 16:40:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.669683257918552) internal successors, (369), 221 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 369 transitions. [2022-01-18 16:40:42,198 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 369 transitions. Word has length 43 [2022-01-18 16:40:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:42,198 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 369 transitions. [2022-01-18 16:40:42,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 369 transitions. [2022-01-18 16:40:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-18 16:40:42,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:40:42,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:40:42,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 16:40:42,411 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:40:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:40:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1138252331, now seen corresponding path program 133 times [2022-01-18 16:40:42,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:40:42,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619570108] [2022-01-18 16:40:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:40:42,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:40:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:40:42,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:40:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619570108] [2022-01-18 16:40:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619570108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:40:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443739162] [2022-01-18 16:40:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:40:42,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:42,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:40:42,717 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:40:42,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 16:40:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:40:42,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-18 16:40:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:40:42,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 16:40:43,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 16:40:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:40:43,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:40:43,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:43,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-18 16:40:43,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:40:43,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 16:40:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-18 16:40:43,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443739162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:40:43,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:40:43,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-01-18 16:40:43,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438251909] [2022-01-18 16:40:43,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:40:43,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:40:43,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:40:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:40:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:40:43,630 INFO L87 Difference]: Start difference. First operand 222 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:40:44,471 INFO L93 Difference]: Finished difference Result 364 states and 607 transitions. [2022-01-18 16:40:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:40:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-18 16:40:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:40:44,471 INFO L225 Difference]: With dead ends: 364 [2022-01-18 16:40:44,471 INFO L226 Difference]: Without dead ends: 0 [2022-01-18 16:40:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 33 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:40:44,472 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:44,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 56 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:40:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-18 16:40:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-18 16:40:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-18 16:40:44,472 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2022-01-18 16:40:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:40:44,472 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-18 16:40:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:40:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-18 16:40:44,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-18 16:40:44,474 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:40:44,474 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:40:44,475 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:40:44,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 16:40:44,689 INFO L732 BasicCegarLoop]: Path program histogram: [133, 1, 1, 1] [2022-01-18 16:40:44,690 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:40:44,691 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:40:44,692 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:40:44 BasicIcfg [2022-01-18 16:40:44,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:40:44,692 INFO L158 Benchmark]: Toolchain (without parser) took 500746.35ms. Allocated memory was 369.1MB in the beginning and 576.7MB in the end (delta: 207.6MB). Free memory was 329.7MB in the beginning and 460.0MB in the end (delta: -130.3MB). Peak memory consumption was 79.7MB. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 369.1MB. Free memory is still 330.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.34ms. Allocated memory is still 369.1MB. Free memory was 329.6MB in the beginning and 328.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 INFO L158 Benchmark]: Boogie Preprocessor took 13.52ms. Allocated memory is still 369.1MB. Free memory was 328.1MB in the beginning and 327.1MB in the end (delta: 991.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 INFO L158 Benchmark]: RCFGBuilder took 182.11ms. Allocated memory is still 369.1MB. Free memory was 327.1MB in the beginning and 317.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 INFO L158 Benchmark]: TraceAbstraction took 500529.92ms. Allocated memory was 369.1MB in the beginning and 576.7MB in the end (delta: 207.6MB). Free memory was 317.2MB in the beginning and 460.0MB in the end (delta: -142.8MB). Peak memory consumption was 67.1MB. Max. memory is 16.0GB. [2022-01-18 16:40:44,692 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 0.12ms. Allocated memory is still 369.1MB. Free memory is still 330.8MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 17.34ms. Allocated memory is still 369.1MB. Free memory was 329.6MB in the beginning and 328.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.52ms. Allocated memory is still 369.1MB. Free memory was 328.1MB in the beginning and 327.1MB in the end (delta: 991.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 182.11ms. Allocated memory is still 369.1MB. Free memory was 327.1MB in the beginning and 317.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 500529.92ms. Allocated memory was 369.1MB in the beginning and 576.7MB in the end (delta: 207.6MB). Free memory was 317.2MB in the beginning and 460.0MB in the end (delta: -142.8MB). Peak memory consumption was 67.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 500.4s, OverallIterations: 136, TraceHistogramMax: 5, PathProgramHistogramMax: 133, EmptinessCheckTime: 0.1s, AutomataDifference: 261.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27018 SdHoareTripleChecker+Valid, 57.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27018 mSDsluCounter, 28327 SdHoareTripleChecker+Invalid, 48.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18297 IncrementalHoareTripleChecker+Unchecked, 47832 mSDsCounter, 31035 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 131957 IncrementalHoareTripleChecker+Invalid, 181289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31035 mSolverCounterUnsat, 1843 mSDtfsCounter, 131957 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18000 GetRequests, 5303 SyntacticMatches, 1759 SemanticMatches, 10938 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 327510 ImplicationChecksByTransitivity, 274.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2688occurred in iteration=87, InterpolantAutomatonStates: 7982, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 136 MinimizatonAttempts, 78965 StatesRemovedByMinimization, 134 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 205.4s InterpolantComputationTime, 8919 NumberOfCodeBlocks, 8919 NumberOfCodeBlocksAsserted, 522 NumberOfCheckSat, 12912 ConstructedInterpolants, 221 QuantifiedInterpolants, 212826 SizeOfPredicates, 1590 NumberOfNonLiveVariables, 12652 ConjunctsInSsa, 4048 ConjunctsInUnsatCore, 400 InterpolantComputations, 5 PerfectInterpolantSequences, 1268/11508 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-18 16:40:44,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...