/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:53:17,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:53:17,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:53:17,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 15:53:17,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:53:17,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:53:17,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:53:17,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:53:17,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:53:17,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:53:17,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:53:17,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:53:17,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:53:17,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:53:17,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:53:17,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:53:17,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:53:17,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:53:17,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:53:17,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:53:17,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:53:17,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:53:17,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:53:17,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:53:17,511 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:53:17,513 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:53:17,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl [2022-03-15 15:53:17,514 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl' [2022-03-15 15:53:17,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:53:17,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:53:17,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:53:17,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:53:17,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:53:17,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,552 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:53:17,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:53:17,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:53:17,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:53:17,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:53:17,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:53:17,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:53:17,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:53:17,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:53:17,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/1) ... [2022-03-15 15:53:17,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:53:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:17,610 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) [2022-03-15 15:53:17,613 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 [2022-03-15 15:53:17,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:53:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:53:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:53:17,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:53:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:53:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:53:17,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:53:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:53:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:53:17,636 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:53:17,672 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:53:17,673 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:53:17,775 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:53:17,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:53:17,823 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 15:53:17,824 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:53:17 BoogieIcfgContainer [2022-03-15 15:53:17,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:53:17,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:53:17,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:53:17,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:53:17,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:53:17" (1/2) ... [2022-03-15 15:53:17,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395736a2 and model type nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:53:17, skipping insertion in model container [2022-03-15 15:53:17,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:53:17" (2/2) ... [2022-03-15 15:53:17,837 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-symm.wvr.bpl [2022-03-15 15:53:17,840 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:53:17,840 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:53:17,840 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:53:17,840 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:53:17,871 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 15:53:17,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:53:17,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:53:17,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 15:53:17,908 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2022-03-15 15:53:17,920 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2022-03-15 15:53:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2022-03-15 15:53:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 15:53:17,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:17,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:17,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1447402805, now seen corresponding path program 1 times [2022-03-15 15:53:17,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:17,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214863061] [2022-03-15 15:53:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214863061] [2022-03-15 15:53:18,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214863061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:53:18,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93348926] [2022-03-15 15:53:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:53:18,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:53:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:53:18,359 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,457 INFO L93 Difference]: Finished difference Result 52 states and 99 transitions. [2022-03-15 15:53:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:53:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 15:53:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,465 INFO L225 Difference]: With dead ends: 52 [2022-03-15 15:53:18,466 INFO L226 Difference]: Without dead ends: 45 [2022-03-15 15:53:18,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:53:18,474 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-15 15:53:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-03-15 15:53:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 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) [2022-03-15 15:53:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 70 transitions. [2022-03-15 15:53:18,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 70 transitions. Word has length 10 [2022-03-15 15:53:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 70 transitions. [2022-03-15 15:53:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 70 transitions. [2022-03-15 15:53:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 15:53:18,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:53:18,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2007948277, now seen corresponding path program 2 times [2022-03-15 15:53:18,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040600019] [2022-03-15 15:53:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040600019] [2022-03-15 15:53:18,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040600019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,604 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:53:18,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064458092] [2022-03-15 15:53:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:53:18,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:53:18,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:53:18,606 INFO L87 Difference]: Start difference. First operand 33 states and 70 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,679 INFO L93 Difference]: Finished difference Result 53 states and 96 transitions. [2022-03-15 15:53:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:53:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 15:53:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,681 INFO L225 Difference]: With dead ends: 53 [2022-03-15 15:53:18,681 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 15:53:18,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:53:18,686 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 15:53:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2022-03-15 15:53:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 69 transitions. [2022-03-15 15:53:18,701 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 69 transitions. Word has length 10 [2022-03-15 15:53:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,701 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 69 transitions. [2022-03-15 15:53:18,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 69 transitions. [2022-03-15 15:53:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 15:53:18,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 15:53:18,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1832558272, now seen corresponding path program 1 times [2022-03-15 15:53:18,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298185693] [2022-03-15 15:53:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298185693] [2022-03-15 15:53:18,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298185693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:53:18,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007007111] [2022-03-15 15:53:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:53:18,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:53:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,737 INFO L87 Difference]: Start difference. First operand 33 states and 69 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-03-15 15:53:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,766 INFO L93 Difference]: Finished difference Result 38 states and 80 transitions. [2022-03-15 15:53:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:53:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-03-15 15:53:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,768 INFO L225 Difference]: With dead ends: 38 [2022-03-15 15:53:18,768 INFO L226 Difference]: Without dead ends: 38 [2022-03-15 15:53:18,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,771 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-15 15:53:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-15 15:53:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.1621621621621623) 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) [2022-03-15 15:53:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 80 transitions. [2022-03-15 15:53:18,775 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 80 transitions. Word has length 11 [2022-03-15 15:53:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,775 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 80 transitions. [2022-03-15 15:53:18,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-03-15 15:53:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 80 transitions. [2022-03-15 15:53:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 15:53:18,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 15:53:18,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1010144050, now seen corresponding path program 1 times [2022-03-15 15:53:18,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008969059] [2022-03-15 15:53:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008969059] [2022-03-15 15:53:18,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008969059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:53:18,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031211396] [2022-03-15 15:53:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:53:18,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:53:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,811 INFO L87 Difference]: Start difference. First operand 38 states and 80 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-03-15 15:53:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,839 INFO L93 Difference]: Finished difference Result 44 states and 93 transitions. [2022-03-15 15:53:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:53:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-03-15 15:53:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,843 INFO L225 Difference]: With dead ends: 44 [2022-03-15 15:53:18,843 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 15:53:18,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,849 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 15:53:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-15 15:53:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 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) [2022-03-15 15:53:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 93 transitions. [2022-03-15 15:53:18,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 93 transitions. Word has length 11 [2022-03-15 15:53:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 93 transitions. [2022-03-15 15:53:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-03-15 15:53:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 93 transitions. [2022-03-15 15:53:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:53:18,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 15:53:18,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash 39109545, now seen corresponding path program 1 times [2022-03-15 15:53:18,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540429941] [2022-03-15 15:53:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:53:18,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540429941] [2022-03-15 15:53:18,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540429941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:53:18,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733059432] [2022-03-15 15:53:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:53:18,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:53:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,892 INFO L87 Difference]: Start difference. First operand 44 states and 93 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,908 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2022-03-15 15:53:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:53:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:53:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,909 INFO L225 Difference]: With dead ends: 44 [2022-03-15 15:53:18,909 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 15:53:18,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,910 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 15:53:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-03-15 15:53:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2022-03-15 15:53:18,913 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 12 [2022-03-15 15:53:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,914 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2022-03-15 15:53:18,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2022-03-15 15:53:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:53:18,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 15:53:18,915 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -340024533, now seen corresponding path program 1 times [2022-03-15 15:53:18,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281164499] [2022-03-15 15:53:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:53:18,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:18,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281164499] [2022-03-15 15:53:18,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281164499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:53:18,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:53:18,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:53:18,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298012477] [2022-03-15 15:53:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:53:18,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:53:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,938 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:18,951 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2022-03-15 15:53:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:53:18,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:53:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:18,952 INFO L225 Difference]: With dead ends: 44 [2022-03-15 15:53:18,952 INFO L226 Difference]: Without dead ends: 39 [2022-03-15 15:53:18,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:53:18,953 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:18,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:53:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-15 15:53:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-15 15:53:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-03-15 15:53:18,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 12 [2022-03-15 15:53:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:18,958 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-03-15 15:53:18,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-03-15 15:53:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:18,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:18,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:18,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 15:53:18,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:18,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2025765751, now seen corresponding path program 1 times [2022-03-15 15:53:18,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:18,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696677146] [2022-03-15 15:53:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:18,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:19,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:19,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696677146] [2022-03-15 15:53:19,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696677146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:19,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599557846] [2022-03-15 15:53:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:19,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:19,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:19,225 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) [2022-03-15 15:53:19,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:53:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:20,015 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 175 treesize of output 151 [2022-03-15 15:53:20,025 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 155 treesize of output 133 [2022-03-15 15:53:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:20,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:21,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:21,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 278 [2022-03-15 15:53:21,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:21,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 246 [2022-03-15 15:53:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:22,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599557846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:22,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:22,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:53:22,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164199220] [2022-03-15 15:53:22,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:22,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:53:22,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:53:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:22,570 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:23,598 INFO L93 Difference]: Finished difference Result 139 states and 259 transitions. [2022-03-15 15:53:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:53:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:53:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:23,600 INFO L225 Difference]: With dead ends: 139 [2022-03-15 15:53:23,600 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:53:23,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:53:23,601 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:23,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 72 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:53:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 54. [2022-03-15 15:53:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 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) [2022-03-15 15:53:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2022-03-15 15:53:23,605 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2022-03-15 15:53:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:23,605 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2022-03-15 15:53:23,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2022-03-15 15:53:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:23,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:23,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:23,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 15:53:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:23,818 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash 80213339, now seen corresponding path program 2 times [2022-03-15 15:53:23,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:23,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853456549] [2022-03-15 15:53:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:24,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853456549] [2022-03-15 15:53:24,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853456549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:24,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023746052] [2022-03-15 15:53:24,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:24,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:24,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:24,032 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) [2022-03-15 15:53:24,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:53:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:24,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 195 [2022-03-15 15:53:24,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:53:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:26,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:26,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 351 treesize of output 323 [2022-03-15 15:53:26,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:26,978 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 319 treesize of output 289 [2022-03-15 15:53:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:27,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023746052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:27,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:27,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:27,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602994950] [2022-03-15 15:53:27,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:27,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:27,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:27,964 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:28,280 INFO L93 Difference]: Finished difference Result 96 states and 181 transitions. [2022-03-15 15:53:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:28,281 INFO L225 Difference]: With dead ends: 96 [2022-03-15 15:53:28,281 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:53:28,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:28,282 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:28,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 73 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:53:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2022-03-15 15:53:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0) internal successors, (110), 55 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 110 transitions. [2022-03-15 15:53:28,285 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 110 transitions. Word has length 14 [2022-03-15 15:53:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:28,285 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 110 transitions. [2022-03-15 15:53:28,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2022-03-15 15:53:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:28,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:28,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:28,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 15:53:28,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-15 15:53:28,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 979729503, now seen corresponding path program 3 times [2022-03-15 15:53:28,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:28,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496210782] [2022-03-15 15:53:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:28,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:28,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:28,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496210782] [2022-03-15 15:53:28,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496210782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:28,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556018210] [2022-03-15 15:53:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:28,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:28,693 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) [2022-03-15 15:53:28,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:53:28,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:53:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:29,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 296 [2022-03-15 15:53:29,211 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 300 treesize of output 260 [2022-03-15 15:53:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:30,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:31,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:31,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 380 [2022-03-15 15:53:31,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:31,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 336 [2022-03-15 15:53:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:32,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556018210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:32,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:32,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:32,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254054553] [2022-03-15 15:53:32,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:32,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:32,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:32,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:32,631 INFO L87 Difference]: Start difference. First operand 56 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:33,931 INFO L93 Difference]: Finished difference Result 164 states and 285 transitions. [2022-03-15 15:53:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:53:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:33,942 INFO L225 Difference]: With dead ends: 164 [2022-03-15 15:53:33,942 INFO L226 Difference]: Without dead ends: 131 [2022-03-15 15:53:33,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:33,943 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:33,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 123 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-15 15:53:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 60. [2022-03-15 15:53:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2022-03-15 15:53:33,948 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 14 [2022-03-15 15:53:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:33,948 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2022-03-15 15:53:33,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2022-03-15 15:53:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:33,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:33,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:33,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 15:53:34,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:34,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2055440659, now seen corresponding path program 4 times [2022-03-15 15:53:34,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:34,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375273401] [2022-03-15 15:53:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:34,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:34,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375273401] [2022-03-15 15:53:34,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375273401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:34,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022209028] [2022-03-15 15:53:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:34,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:34,330 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) [2022-03-15 15:53:34,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:53:34,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:34,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 15:53:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:34,688 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 220 treesize of output 190 [2022-03-15 15:53:34,694 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 207 treesize of output 179 [2022-03-15 15:53:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:35,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:36,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:36,305 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 299 treesize of output 273 [2022-03-15 15:53:36,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:36,318 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 269 treesize of output 251 [2022-03-15 15:53:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022209028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:36,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:36,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:36,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339223520] [2022-03-15 15:53:36,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:36,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:36,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:36,987 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:37,358 INFO L93 Difference]: Finished difference Result 101 states and 196 transitions. [2022-03-15 15:53:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:37,358 INFO L225 Difference]: With dead ends: 101 [2022-03-15 15:53:37,359 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:53:37,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:37,359 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 53 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:53:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:53:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-03-15 15:53:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2022-03-15 15:53:37,362 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 14 [2022-03-15 15:53:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:37,363 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2022-03-15 15:53:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2022-03-15 15:53:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:37,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:37,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:37,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:37,583 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1461389305, now seen corresponding path program 5 times [2022-03-15 15:53:37,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:37,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300823837] [2022-03-15 15:53:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:37,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:37,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300823837] [2022-03-15 15:53:37,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300823837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:37,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054037416] [2022-03-15 15:53:37,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:37,800 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) [2022-03-15 15:53:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:53:37,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:37,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 15:53:37,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:38,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 138 [2022-03-15 15:53:38,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 133 [2022-03-15 15:53:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:39,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:39,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 302 [2022-03-15 15:53:39,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:39,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 274 [2022-03-15 15:53:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054037416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:40,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:40,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:53:40,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86484872] [2022-03-15 15:53:40,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:40,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:53:40,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:53:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:53:40,301 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:40,627 INFO L93 Difference]: Finished difference Result 82 states and 161 transitions. [2022-03-15 15:53:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:53:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:53:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:40,628 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:53:40,628 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 15:53:40,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:53:40,629 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:40,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:53:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 15:53:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2022-03-15 15:53:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2022-03-15 15:53:40,632 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 14 [2022-03-15 15:53:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:40,632 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2022-03-15 15:53:40,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2022-03-15 15:53:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:40,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:40,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:40,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 15:53:40,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1849136073, now seen corresponding path program 6 times [2022-03-15 15:53:40,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:40,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505463381] [2022-03-15 15:53:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:40,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505463381] [2022-03-15 15:53:40,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505463381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:40,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013499375] [2022-03-15 15:53:40,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:40,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:40,993 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) [2022-03-15 15:53:40,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:53:41,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:53:41,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:41,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 199 [2022-03-15 15:53:41,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-03-15 15:53:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:43,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:43,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 463 treesize of output 425 [2022-03-15 15:53:43,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:43,693 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 421 treesize of output 373 [2022-03-15 15:53:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:44,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013499375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:44,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:44,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:44,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434916506] [2022-03-15 15:53:44,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:44,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:44,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:44,737 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:45,047 INFO L93 Difference]: Finished difference Result 100 states and 194 transitions. [2022-03-15 15:53:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:53:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:45,048 INFO L225 Difference]: With dead ends: 100 [2022-03-15 15:53:45,048 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:53:45,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:53:45,049 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:45,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 86 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:53:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2022-03-15 15:53:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2022-03-15 15:53:45,052 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 14 [2022-03-15 15:53:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:45,052 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2022-03-15 15:53:45,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2022-03-15 15:53:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:45,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:45,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:45,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:45,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:45,266 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:45,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1546315059, now seen corresponding path program 7 times [2022-03-15 15:53:45,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:45,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230442390] [2022-03-15 15:53:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:45,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:45,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:45,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230442390] [2022-03-15 15:53:45,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230442390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:45,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048724340] [2022-03-15 15:53:45,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:45,420 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) [2022-03-15 15:53:45,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:53:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:45,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 217 [2022-03-15 15:53:45,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 191 [2022-03-15 15:53:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:47,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:47,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 546 treesize of output 496 [2022-03-15 15:53:47,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:47,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 430 [2022-03-15 15:53:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048724340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:49,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:49,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:49,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800451395] [2022-03-15 15:53:49,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:49,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:49,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:49,027 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:50,201 INFO L93 Difference]: Finished difference Result 171 states and 304 transitions. [2022-03-15 15:53:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:50,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:50,202 INFO L225 Difference]: With dead ends: 171 [2022-03-15 15:53:50,202 INFO L226 Difference]: Without dead ends: 138 [2022-03-15 15:53:50,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:50,202 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:50,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-15 15:53:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 63. [2022-03-15 15:53:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2022-03-15 15:53:50,205 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 14 [2022-03-15 15:53:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:50,205 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2022-03-15 15:53:50,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2022-03-15 15:53:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:50,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:50,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:50,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:50,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:50,418 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -470603903, now seen corresponding path program 8 times [2022-03-15 15:53:50,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:50,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047036590] [2022-03-15 15:53:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:50,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047036590] [2022-03-15 15:53:50,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047036590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:50,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597999174] [2022-03-15 15:53:50,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:50,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:50,595 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) [2022-03-15 15:53:50,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:53:50,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:53:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:51,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 186 [2022-03-15 15:53:51,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 164 [2022-03-15 15:53:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:53,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:53,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 344 [2022-03-15 15:53:53,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:53,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 314 [2022-03-15 15:53:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:54,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597999174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:54,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:54,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:53:54,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005389241] [2022-03-15 15:53:54,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:54,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:53:54,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:53:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:53:54,625 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:55,706 INFO L93 Difference]: Finished difference Result 154 states and 291 transitions. [2022-03-15 15:53:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 14 [2022-03-15 15:53:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:55,707 INFO L225 Difference]: With dead ends: 154 [2022-03-15 15:53:55,707 INFO L226 Difference]: Without dead ends: 121 [2022-03-15 15:53:55,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:55,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:55,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 79 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-15 15:53:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2022-03-15 15:53:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2022-03-15 15:53:55,710 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 14 [2022-03-15 15:53:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:55,710 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2022-03-15 15:53:55,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2022-03-15 15:53:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2022-03-15 15:53:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:53:55,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:55,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:55,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 15:53:55,927 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,SelfDestructingSolverStorable13 [2022-03-15 15:53:55,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1989642701, now seen corresponding path program 9 times [2022-03-15 15:53:55,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:55,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568844968] [2022-03-15 15:53:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:56,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568844968] [2022-03-15 15:53:56,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568844968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:56,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541635297] [2022-03-15 15:53:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:56,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:56,123 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) [2022-03-15 15:53:56,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:53:56,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:56,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 15:53:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:56,424 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 182 treesize of output 156 [2022-03-15 15:53:56,427 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 160 treesize of output 138 [2022-03-15 15:53:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:58,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:58,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 266 [2022-03-15 15:53:58,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:58,373 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 245 treesize of output 225 [2022-03-15 15:53:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:58,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541635297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:58,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:58,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:53:58,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445677877] [2022-03-15 15:53:58,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:58,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:53:58,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:53:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:53:58,962 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-03-15 15:53:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:59,262 INFO L93 Difference]: Finished difference Result 114 states and 232 transitions. [2022-03-15 15:53:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:53:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 14 [2022-03-15 15:53:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:59,264 INFO L225 Difference]: With dead ends: 114 [2022-03-15 15:53:59,264 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:53:59,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:53:59,264 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:59,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 63 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:53:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:53:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2022-03-15 15:53:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 147 transitions. [2022-03-15 15:53:59,267 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 147 transitions. Word has length 14 [2022-03-15 15:53:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:59,267 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 147 transitions. [2022-03-15 15:53:59,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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) [2022-03-15 15:53:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 147 transitions. [2022-03-15 15:53:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:53:59,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:59,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:59,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 15:53:59,479 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 167740356, now seen corresponding path program 10 times [2022-03-15 15:53:59,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:59,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532284734] [2022-03-15 15:53:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:59,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532284734] [2022-03-15 15:53:59,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532284734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:59,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497809384] [2022-03-15 15:53:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:59,541 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) [2022-03-15 15:53:59,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:53:59,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:53:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:59,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:53:59,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:53:59,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:53:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497809384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:59,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:59,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 15:53:59,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518719705] [2022-03-15 15:53:59,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:59,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:53:59,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:53:59,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:53:59,768 INFO L87 Difference]: Start difference. First operand 70 states and 147 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:59,840 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2022-03-15 15:53:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:53:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2022-03-15 15:53:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:59,841 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:53:59,841 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:53:59,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:53:59,842 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:59,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:53:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:53:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2022-03-15 15:53:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 136 transitions. [2022-03-15 15:53:59,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 136 transitions. Word has length 15 [2022-03-15 15:53:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:59,844 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 136 transitions. [2022-03-15 15:53:59,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 136 transitions. [2022-03-15 15:53:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:53:59,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:59,845 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:59,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:00,060 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,SelfDestructingSolverStorable15 [2022-03-15 15:54:00,060 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1741865686, now seen corresponding path program 11 times [2022-03-15 15:54:00,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:00,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684925739] [2022-03-15 15:54:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:00,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684925739] [2022-03-15 15:54:00,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684925739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:00,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941005975] [2022-03-15 15:54:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:00,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:00,117 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) [2022-03-15 15:54:00,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:54:00,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:00,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:00,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:54:00,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941005975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:00,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:00,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:54:00,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092633040] [2022-03-15 15:54:00,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:00,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:54:00,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:54:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:54:00,377 INFO L87 Difference]: Start difference. First operand 64 states and 136 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-03-15 15:54:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:00,441 INFO L93 Difference]: Finished difference Result 85 states and 176 transitions. [2022-03-15 15:54:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:54:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:00,442 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:54:00,442 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:54:00,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:00,442 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:00,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:54:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-03-15 15:54:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 62 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 133 transitions. [2022-03-15 15:54:00,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 133 transitions. Word has length 15 [2022-03-15 15:54:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:00,445 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 133 transitions. [2022-03-15 15:54:00,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-03-15 15:54:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 133 transitions. [2022-03-15 15:54:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:00,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:00,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:00,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:00,645 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,SelfDestructingSolverStorable16 [2022-03-15 15:54:00,646 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -336731508, now seen corresponding path program 12 times [2022-03-15 15:54:00,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:00,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64468209] [2022-03-15 15:54:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:00,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64468209] [2022-03-15 15:54:00,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64468209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:00,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034437543] [2022-03-15 15:54:00,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:00,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:00,705 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) [2022-03-15 15:54:00,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:54:00,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:54:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:00,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:00,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:54:00,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:54:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:00,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:01,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:01,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:01,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:01,009 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 43 treesize of output 41 [2022-03-15 15:54:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034437543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:01,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:01,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:54:01,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908600970] [2022-03-15 15:54:01,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:01,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:54:01,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:54:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:01,097 INFO L87 Difference]: Start difference. First operand 63 states and 133 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:01,280 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2022-03-15 15:54:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:54:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:01,281 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:54:01,281 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:54:01,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:54:01,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:01,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:54:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2022-03-15 15:54:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 67 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 145 transitions. [2022-03-15 15:54:01,284 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 145 transitions. Word has length 15 [2022-03-15 15:54:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:01,284 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 145 transitions. [2022-03-15 15:54:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 145 transitions. [2022-03-15 15:54:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:01,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:01,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:01,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:01,499 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,SelfDestructingSolverStorable17 [2022-03-15 15:54:01,499 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1477390454, now seen corresponding path program 13 times [2022-03-15 15:54:01,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:01,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743438298] [2022-03-15 15:54:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:01,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743438298] [2022-03-15 15:54:01,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743438298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:01,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479679061] [2022-03-15 15:54:01,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:01,548 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) [2022-03-15 15:54:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:54:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:01,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:54:01,637 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 44 treesize of output 34 [2022-03-15 15:54:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:01,815 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:01,815 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 13 treesize of output 12 [2022-03-15 15:54:01,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479679061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:01,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:01,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:54:01,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904399170] [2022-03-15 15:54:01,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:54:01,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:54:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:54:01,825 INFO L87 Difference]: Start difference. First operand 68 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:01,931 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2022-03-15 15:54:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:54:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:01,932 INFO L225 Difference]: With dead ends: 97 [2022-03-15 15:54:01,932 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:54:01,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:54:01,933 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:01,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 55 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:54:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-03-15 15:54:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 67 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 145 transitions. [2022-03-15 15:54:01,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 145 transitions. Word has length 15 [2022-03-15 15:54:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:01,935 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 145 transitions. [2022-03-15 15:54:01,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 145 transitions. [2022-03-15 15:54:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:01,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:01,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:01,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,151 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2071441808, now seen corresponding path program 14 times [2022-03-15 15:54:02,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:02,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310278107] [2022-03-15 15:54:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:02,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310278107] [2022-03-15 15:54:02,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310278107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:02,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694229812] [2022-03-15 15:54:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:02,211 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) [2022-03-15 15:54:02,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:54:02,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:02,305 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 50 treesize of output 40 [2022-03-15 15:54:02,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:02,489 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:02,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:54:02,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694229812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:02,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:02,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:54:02,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749068257] [2022-03-15 15:54:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:02,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:54:02,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:54:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:54:02,494 INFO L87 Difference]: Start difference. First operand 68 states and 145 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:02,572 INFO L93 Difference]: Finished difference Result 84 states and 172 transitions. [2022-03-15 15:54:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:54:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:02,573 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:54:02,573 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:54:02,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:02,573 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:02,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:54:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2022-03-15 15:54:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 67 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 144 transitions. [2022-03-15 15:54:02,575 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 144 transitions. Word has length 15 [2022-03-15 15:54:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:02,575 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 144 transitions. [2022-03-15 15:54:02,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 144 transitions. [2022-03-15 15:54:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:02,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:02,576 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:02,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:02,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,792 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 562784656, now seen corresponding path program 15 times [2022-03-15 15:54:02,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:02,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063408861] [2022-03-15 15:54:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:02,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063408861] [2022-03-15 15:54:02,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063408861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:02,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428141946] [2022-03-15 15:54:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:02,859 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) [2022-03-15 15:54:02,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:54:02,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:03,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:54:03,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:54:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:03,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:03,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:03,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:03,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 15:54:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428141946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:03,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:03,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:03,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245265467] [2022-03-15 15:54:03,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:03,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:03,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:03,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:03,335 INFO L87 Difference]: Start difference. First operand 68 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:03,443 INFO L93 Difference]: Finished difference Result 88 states and 180 transitions. [2022-03-15 15:54:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:03,443 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:54:03,444 INFO L226 Difference]: Without dead ends: 88 [2022-03-15 15:54:03,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:54:03,444 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:03,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-15 15:54:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2022-03-15 15:54:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2022-03-15 15:54:03,446 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 15 [2022-03-15 15:54:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:03,446 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2022-03-15 15:54:03,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2022-03-15 15:54:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:03,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:03,446 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:03,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:03,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:03,657 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1022453184, now seen corresponding path program 16 times [2022-03-15 15:54:03,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:03,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595692331] [2022-03-15 15:54:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:03,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595692331] [2022-03-15 15:54:03,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595692331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:03,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770528094] [2022-03-15 15:54:03,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:03,729 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) [2022-03-15 15:54:03,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:54:03,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:03,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:03,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:03,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:03,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:03,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:54:03,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:03,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:54:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:04,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:04,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770528094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:04,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:04,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:04,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086408150] [2022-03-15 15:54:04,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:04,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:04,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:04,086 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:04,156 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2022-03-15 15:54:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:04,157 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:54:04,157 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:54:04,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:04,157 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:04,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-03-15 15:54:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:54:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-03-15 15:54:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2022-03-15 15:54:04,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2022-03-15 15:54:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2022-03-15 15:54:04,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2022-03-15 15:54:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:04,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:04,172 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:04,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:04,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 15:54:04,372 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash 53257972, now seen corresponding path program 17 times [2022-03-15 15:54:04,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:04,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046746953] [2022-03-15 15:54:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:04,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046746953] [2022-03-15 15:54:04,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046746953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:04,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119530302] [2022-03-15 15:54:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:04,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:04,438 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) [2022-03-15 15:54:04,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:54:04,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:04,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:54:04,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:04,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 34 [2022-03-15 15:54:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:04,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:04,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:04,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:54:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119530302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:04,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:04,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:04,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138271347] [2022-03-15 15:54:04,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:04,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:04,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:04,808 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:04,924 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2022-03-15 15:54:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:54:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:04,925 INFO L225 Difference]: With dead ends: 86 [2022-03-15 15:54:04,925 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:54:04,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:54:04,926 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:04,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-03-15 15:54:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:54:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2022-03-15 15:54:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2022-03-15 15:54:04,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2022-03-15 15:54:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:04,928 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2022-03-15 15:54:04,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2022-03-15 15:54:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:04,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:04,928 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:04,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:05,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:05,140 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2093433082, now seen corresponding path program 18 times [2022-03-15 15:54:05,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:05,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035686826] [2022-03-15 15:54:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:05,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035686826] [2022-03-15 15:54:05,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035686826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:05,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030936478] [2022-03-15 15:54:05,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:05,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:05,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:05,203 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) [2022-03-15 15:54:05,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:54:05,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:54:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:05,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:05,435 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:54:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:05,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:54:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:05,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:05,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:05,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:05,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:54:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030936478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:05,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:05,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:05,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133343806] [2022-03-15 15:54:05,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:05,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:05,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:05,712 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:05,746 INFO L93 Difference]: Finished difference Result 74 states and 157 transitions. [2022-03-15 15:54:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:05,748 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:54:05,748 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:54:05,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:05,748 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:05,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-03-15 15:54:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:54:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-03-15 15:54:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2022-03-15 15:54:05,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 15 [2022-03-15 15:54:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:05,750 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2022-03-15 15:54:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2022-03-15 15:54:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:05,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:05,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:05,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:05,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:05,959 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash 203820934, now seen corresponding path program 19 times [2022-03-15 15:54:05,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:05,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066141045] [2022-03-15 15:54:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:06,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066141045] [2022-03-15 15:54:06,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066141045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:06,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791720601] [2022-03-15 15:54:06,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:06,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:06,023 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) [2022-03-15 15:54:06,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:54:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:06,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:06,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 40 [2022-03-15 15:54:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:06,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:06,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:06,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:06,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791720601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:06,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:06,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:54:06,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447215264] [2022-03-15 15:54:06,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:54:06,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:54:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:06,429 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:06,503 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2022-03-15 15:54:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:06,504 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:54:06,504 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:54:06,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:06,504 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:06,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 47 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:54:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2022-03-15 15:54:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-03-15 15:54:06,506 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 15 [2022-03-15 15:54:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-03-15 15:54:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-03-15 15:54:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:06,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:06,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:06,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:06,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,722 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -936838012, now seen corresponding path program 20 times [2022-03-15 15:54:06,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:06,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190418462] [2022-03-15 15:54:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:06,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:06,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190418462] [2022-03-15 15:54:06,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190418462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:06,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646486850] [2022-03-15 15:54:06,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:06,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:06,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:06,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:54:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:06,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:06,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:06,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,923 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:54:06,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:06,928 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 35 treesize of output 27 [2022-03-15 15:54:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:07,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:07,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,061 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 43 treesize of output 41 [2022-03-15 15:54:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646486850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:07,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:07,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:07,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863649149] [2022-03-15 15:54:07,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:07,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:07,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:07,181 INFO L87 Difference]: Start difference. First operand 71 states and 153 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:07,240 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2022-03-15 15:54:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:07,241 INFO L225 Difference]: With dead ends: 97 [2022-03-15 15:54:07,241 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:54:07,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:07,242 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:07,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:54:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2022-03-15 15:54:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-03-15 15:54:07,243 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 15 [2022-03-15 15:54:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:07,244 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-03-15 15:54:07,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-03-15 15:54:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:07,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:07,244 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:07,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:07,451 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,SelfDestructingSolverStorable25 [2022-03-15 15:54:07,452 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1530889366, now seen corresponding path program 21 times [2022-03-15 15:54:07,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:07,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546812840] [2022-03-15 15:54:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:07,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546812840] [2022-03-15 15:54:07,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546812840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:07,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796817275] [2022-03-15 15:54:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:07,523 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) [2022-03-15 15:54:07,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:54:07,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:54:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:07,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2022-03-15 15:54:07,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:07,651 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:54:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:07,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:07,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:07,767 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 43 treesize of output 41 [2022-03-15 15:54:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796817275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:07,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:07,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:54:07,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572248837] [2022-03-15 15:54:07,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:07,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:54:07,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:54:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:07,862 INFO L87 Difference]: Start difference. First operand 71 states and 153 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:07,969 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2022-03-15 15:54:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:07,970 INFO L225 Difference]: With dead ends: 98 [2022-03-15 15:54:07,970 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:54:07,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:07,970 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:07,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:54:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-15 15:54:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 70 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 152 transitions. [2022-03-15 15:54:07,972 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 152 transitions. Word has length 15 [2022-03-15 15:54:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:07,972 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 152 transitions. [2022-03-15 15:54:07,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 152 transitions. [2022-03-15 15:54:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:07,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:07,973 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:07,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 15:54:08,176 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,SelfDestructingSolverStorable26 [2022-03-15 15:54:08,176 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1103337098, now seen corresponding path program 22 times [2022-03-15 15:54:08,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:08,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301342379] [2022-03-15 15:54:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:08,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301342379] [2022-03-15 15:54:08,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301342379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:08,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388557028] [2022-03-15 15:54:08,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:08,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:08,229 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) [2022-03-15 15:54:08,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:54:08,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:08,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:08,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 40 [2022-03-15 15:54:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:08,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:08,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:08,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:08,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:08,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388557028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:08,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:08,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:08,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798970290] [2022-03-15 15:54:08,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:08,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:08,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:08,600 INFO L87 Difference]: Start difference. First operand 71 states and 152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:08,686 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2022-03-15 15:54:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:08,687 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:54:08,687 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:54:08,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:08,687 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 45 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:54:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-03-15 15:54:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 69 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 150 transitions. [2022-03-15 15:54:08,689 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 150 transitions. Word has length 15 [2022-03-15 15:54:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:08,689 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 150 transitions. [2022-03-15 15:54:08,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 150 transitions. [2022-03-15 15:54:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:08,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:08,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:08,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:08,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 15:54:08,907 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2066119168, now seen corresponding path program 23 times [2022-03-15 15:54:08,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:08,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62009938] [2022-03-15 15:54:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:08,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62009938] [2022-03-15 15:54:08,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62009938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:08,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225670692] [2022-03-15 15:54:08,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:08,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:08,960 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) [2022-03-15 15:54:08,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:54:09,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:09,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:09,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 19 [2022-03-15 15:54:09,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 17 [2022-03-15 15:54:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:09,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,219 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 42 treesize of output 40 [2022-03-15 15:54:09,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:54:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225670692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:09,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:09,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:54:09,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757881672] [2022-03-15 15:54:09,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:09,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:54:09,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:54:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:54:09,297 INFO L87 Difference]: Start difference. First operand 70 states and 150 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:09,378 INFO L93 Difference]: Finished difference Result 81 states and 168 transitions. [2022-03-15 15:54:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:09,379 INFO L225 Difference]: With dead ends: 81 [2022-03-15 15:54:09,379 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:54:09,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:09,379 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:09,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:54:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-15 15:54:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 69 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 149 transitions. [2022-03-15 15:54:09,381 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 149 transitions. Word has length 15 [2022-03-15 15:54:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:09,381 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 149 transitions. [2022-03-15 15:54:09,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 149 transitions. [2022-03-15 15:54:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:09,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:09,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:09,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:09,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:09,582 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2115919042, now seen corresponding path program 24 times [2022-03-15 15:54:09,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:09,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675100393] [2022-03-15 15:54:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:09,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675100393] [2022-03-15 15:54:09,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675100393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:09,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198339063] [2022-03-15 15:54:09,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:09,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:09,641 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) [2022-03-15 15:54:09,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:54:09,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:54:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:09,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,788 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:54:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:09,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:54:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:09,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:09,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:09,944 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 16 treesize of output 20 [2022-03-15 15:54:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:09,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198339063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:09,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:09,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:09,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517925164] [2022-03-15 15:54:09,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:09,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:09,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:09,978 INFO L87 Difference]: Start difference. First operand 70 states and 149 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:10,037 INFO L93 Difference]: Finished difference Result 77 states and 161 transitions. [2022-03-15 15:54:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:10,038 INFO L225 Difference]: With dead ends: 77 [2022-03-15 15:54:10,038 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:54:10,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:10,039 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:10,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:54:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2022-03-15 15:54:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 140 transitions. [2022-03-15 15:54:10,041 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 140 transitions. Word has length 15 [2022-03-15 15:54:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 140 transitions. [2022-03-15 15:54:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 140 transitions. [2022-03-15 15:54:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:10,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:10,041 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:10,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:10,242 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2020423278, now seen corresponding path program 25 times [2022-03-15 15:54:10,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:10,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656067637] [2022-03-15 15:54:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:10,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656067637] [2022-03-15 15:54:10,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656067637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:10,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101754912] [2022-03-15 15:54:10,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:10,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:10,303 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) [2022-03-15 15:54:10,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:54:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:10,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:54:10,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:10,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:54:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:10,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:10,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:10,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:10,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101754912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:10,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:10,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:10,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889662721] [2022-03-15 15:54:10,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:10,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:10,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:10,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:10,603 INFO L87 Difference]: Start difference. First operand 66 states and 140 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:10,646 INFO L93 Difference]: Finished difference Result 81 states and 169 transitions. [2022-03-15 15:54:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:10,647 INFO L225 Difference]: With dead ends: 81 [2022-03-15 15:54:10,647 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 15:54:10,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:10,647 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:10,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 15:54:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2022-03-15 15:54:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2022-03-15 15:54:10,649 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2022-03-15 15:54:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:10,649 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2022-03-15 15:54:10,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2022-03-15 15:54:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:10,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:10,649 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:10,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 15:54:10,859 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,SelfDestructingSolverStorable30 [2022-03-15 15:54:10,859 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash -944712122, now seen corresponding path program 26 times [2022-03-15 15:54:10,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:10,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869847274] [2022-03-15 15:54:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:10,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869847274] [2022-03-15 15:54:10,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869847274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:10,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068422766] [2022-03-15 15:54:10,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:10,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:10,921 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) [2022-03-15 15:54:10,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:54:10,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,037 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:54:11,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:11,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:11,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068422766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:11,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:11,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:11,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932434251] [2022-03-15 15:54:11,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:11,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:11,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:11,256 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:11,315 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2022-03-15 15:54:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:11,316 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:54:11,316 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:54:11,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:11,316 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:11,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:54:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-03-15 15:54:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2022-03-15 15:54:11,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2022-03-15 15:54:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:11,318 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2022-03-15 15:54:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2022-03-15 15:54:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:11,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:11,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:11,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:11,523 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,SelfDestructingSolverStorable31 [2022-03-15 15:54:11,523 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1095462988, now seen corresponding path program 27 times [2022-03-15 15:54:11,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:11,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75558668] [2022-03-15 15:54:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:11,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75558668] [2022-03-15 15:54:11,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75558668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:11,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212583521] [2022-03-15 15:54:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:11,576 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) [2022-03-15 15:54:11,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:54:11,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 31 [2022-03-15 15:54:11,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:11,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:54:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:11,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:11,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 15:54:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212583521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:11,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:11,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:11,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175921343] [2022-03-15 15:54:11,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:11,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:11,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:11,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:11,945 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:12,000 INFO L93 Difference]: Finished difference Result 72 states and 151 transitions. [2022-03-15 15:54:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:12,000 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:54:12,000 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:54:12,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:12,001 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:12,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:54:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-03-15 15:54:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2022-03-15 15:54:12,002 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2022-03-15 15:54:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:12,003 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2022-03-15 15:54:12,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2022-03-15 15:54:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:12,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:12,003 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:12,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 15:54:12,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:12,219 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1957404654, now seen corresponding path program 28 times [2022-03-15 15:54:12,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:12,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592180974] [2022-03-15 15:54:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:12,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:12,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592180974] [2022-03-15 15:54:12,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592180974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:12,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148313113] [2022-03-15 15:54:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:12,276 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) [2022-03-15 15:54:12,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:54:12,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:12,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:12,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:54:12,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:12,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:54:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:12,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:12,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:12,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:12,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 15:54:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148313113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:12,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:12,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:12,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735954605] [2022-03-15 15:54:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:12,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:12,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:12,710 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:12,748 INFO L93 Difference]: Finished difference Result 85 states and 165 transitions. [2022-03-15 15:54:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:12,749 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:54:12,749 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:54:12,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:12,749 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:12,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-03-15 15:54:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:54:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2022-03-15 15:54:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2022-03-15 15:54:12,751 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2022-03-15 15:54:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2022-03-15 15:54:12,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2022-03-15 15:54:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:12,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:12,752 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:12,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:12,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:12,960 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1230878034, now seen corresponding path program 29 times [2022-03-15 15:54:12,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:12,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701740935] [2022-03-15 15:54:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:13,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701740935] [2022-03-15 15:54:13,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701740935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:13,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143857920] [2022-03-15 15:54:13,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:13,018 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) [2022-03-15 15:54:13,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:54:13,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:13,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:13,164 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 25 treesize of output 19 [2022-03-15 15:54:13,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:54:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:13,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:54:13,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-03-15 15:54:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143857920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:13,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:13,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:54:13,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000687625] [2022-03-15 15:54:13,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:54:13,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:54:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:13,327 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:13,418 INFO L93 Difference]: Finished difference Result 65 states and 129 transitions. [2022-03-15 15:54:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:13,419 INFO L225 Difference]: With dead ends: 65 [2022-03-15 15:54:13,419 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:54:13,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:13,419 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:13,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:54:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-15 15:54:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-03-15 15:54:13,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-03-15 15:54:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:13,421 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-03-15 15:54:13,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-03-15 15:54:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:13,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:13,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:13,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:13,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:13,622 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1158481612, now seen corresponding path program 30 times [2022-03-15 15:54:13,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:13,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492957077] [2022-03-15 15:54:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:13,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492957077] [2022-03-15 15:54:13,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492957077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:13,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135623683] [2022-03-15 15:54:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:13,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:13,687 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) [2022-03-15 15:54:13,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:54:13,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:54:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:13,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:13,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:54:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:13,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:54:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:14,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:54:14,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135623683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:14,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:14,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:14,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825502214] [2022-03-15 15:54:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:14,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:14,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:14,091 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:14,163 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2022-03-15 15:54:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:14,163 INFO L225 Difference]: With dead ends: 68 [2022-03-15 15:54:14,164 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:54:14,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:14,164 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:14,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 45 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-03-15 15:54:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:54:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-03-15 15:54:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 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) [2022-03-15 15:54:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2022-03-15 15:54:14,165 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2022-03-15 15:54:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2022-03-15 15:54:14,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2022-03-15 15:54:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:14,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:14,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:14,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 15:54:14,379 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,SelfDestructingSolverStorable35 [2022-03-15 15:54:14,379 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash 587026806, now seen corresponding path program 31 times [2022-03-15 15:54:14,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:14,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936927369] [2022-03-15 15:54:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:14,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936927369] [2022-03-15 15:54:14,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936927369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:14,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988681006] [2022-03-15 15:54:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:14,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:14,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:14,448 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) [2022-03-15 15:54:14,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:54:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:14,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:54:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:14,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:54:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:14,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,782 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 18 treesize of output 22 [2022-03-15 15:54:14,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:14,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:54:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988681006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:14,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:14,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:14,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789362330] [2022-03-15 15:54:14,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:14,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:14,816 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:14,873 INFO L93 Difference]: Finished difference Result 67 states and 132 transitions. [2022-03-15 15:54:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:14,874 INFO L225 Difference]: With dead ends: 67 [2022-03-15 15:54:14,874 INFO L226 Difference]: Without dead ends: 67 [2022-03-15 15:54:14,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:54:14,874 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:14,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-03-15 15:54:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-15 15:54:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-15 15:54:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 117 transitions. [2022-03-15 15:54:14,876 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 117 transitions. Word has length 15 [2022-03-15 15:54:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:14,876 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 117 transitions. [2022-03-15 15:54:14,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 117 transitions. [2022-03-15 15:54:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:14,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:14,876 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:14,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 15:54:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 15:54:15,077 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash -639711642, now seen corresponding path program 32 times [2022-03-15 15:54:15,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:15,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20751678] [2022-03-15 15:54:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:15,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20751678] [2022-03-15 15:54:15,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20751678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:15,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488179839] [2022-03-15 15:54:15,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:15,130 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) [2022-03-15 15:54:15,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:54:15,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:15,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:54:15,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:15,457 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:15,458 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 13 treesize of output 12 [2022-03-15 15:54:15,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488179839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:15,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:15,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:54:15,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674319400] [2022-03-15 15:54:15,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:15,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:54:15,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:15,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:54:15,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:54:15,463 INFO L87 Difference]: Start difference. First operand 59 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:15,534 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2022-03-15 15:54:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:54:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:15,535 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:54:15,535 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:54:15,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:15,535 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:15,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 40 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:54:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-03-15 15:54:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2022-03-15 15:54:15,537 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 15 [2022-03-15 15:54:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:15,537 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2022-03-15 15:54:15,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2022-03-15 15:54:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:15,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:15,537 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:15,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 15:54:15,749 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1780370588, now seen corresponding path program 33 times [2022-03-15 15:54:15,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:15,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269205717] [2022-03-15 15:54:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:15,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269205717] [2022-03-15 15:54:15,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269205717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:15,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923088105] [2022-03-15 15:54:15,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:15,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:15,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:15,799 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) [2022-03-15 15:54:15,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:54:15,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:15,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:54:15,965 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 38 treesize of output 30 [2022-03-15 15:54:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:16,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:16,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-15 15:54:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923088105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:16,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:16,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:54:16,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864394404] [2022-03-15 15:54:16,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:16,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:54:16,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:54:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:16,204 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:16,286 INFO L93 Difference]: Finished difference Result 87 states and 166 transitions. [2022-03-15 15:54:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:16,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:16,287 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:54:16,287 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:54:16,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:54:16,287 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:16,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 44 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:54:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-15 15:54:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2022-03-15 15:54:16,289 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 15 [2022-03-15 15:54:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:16,289 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2022-03-15 15:54:16,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2022-03-15 15:54:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:16,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:16,289 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:16,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 15:54:16,499 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,SelfDestructingSolverStorable38 [2022-03-15 15:54:16,500 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1920545354, now seen corresponding path program 34 times [2022-03-15 15:54:16,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:16,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533864650] [2022-03-15 15:54:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:16,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533864650] [2022-03-15 15:54:16,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533864650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:16,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557464888] [2022-03-15 15:54:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:16,550 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) [2022-03-15 15:54:16,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:54:16,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:16,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:16,708 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 42 treesize of output 34 [2022-03-15 15:54:16,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:54:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:16,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:16,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 15:54:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557464888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:16,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:16,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:54:16,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049375251] [2022-03-15 15:54:16,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:16,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:54:16,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:54:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:16,929 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:17,063 INFO L93 Difference]: Finished difference Result 89 states and 167 transitions. [2022-03-15 15:54:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:54:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:17,064 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:54:17,064 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:54:17,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:54:17,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:17,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 47 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:54:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-15 15:54:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 131 transitions. [2022-03-15 15:54:17,066 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 131 transitions. Word has length 15 [2022-03-15 15:54:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:17,066 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 131 transitions. [2022-03-15 15:54:17,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 131 transitions. [2022-03-15 15:54:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:17,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:17,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:17,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 15:54:17,273 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,SelfDestructingSolverStorable39 [2022-03-15 15:54:17,273 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 259804522, now seen corresponding path program 35 times [2022-03-15 15:54:17,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:17,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94005389] [2022-03-15 15:54:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:17,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94005389] [2022-03-15 15:54:17,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94005389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:17,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037850281] [2022-03-15 15:54:17,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:17,324 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) [2022-03-15 15:54:17,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:54:17,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:17,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:54:17,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:54:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:17,610 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:17,611 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 13 treesize of output 12 [2022-03-15 15:54:17,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037850281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:17,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:17,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:54:17,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635943324] [2022-03-15 15:54:17,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:17,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:54:17,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:54:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:54:17,617 INFO L87 Difference]: Start difference. First operand 65 states and 131 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:17,730 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2022-03-15 15:54:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:54:17,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:17,730 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:54:17,730 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:54:17,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:54:17,731 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:17,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 60 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:54:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2022-03-15 15:54:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 63 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 129 transitions. [2022-03-15 15:54:17,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 129 transitions. Word has length 15 [2022-03-15 15:54:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:17,732 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 129 transitions. [2022-03-15 15:54:17,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 129 transitions. [2022-03-15 15:54:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:17,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:17,733 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:17,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 15:54:17,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,939 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1385315552, now seen corresponding path program 36 times [2022-03-15 15:54:17,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:17,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044908919] [2022-03-15 15:54:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:17,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044908919] [2022-03-15 15:54:17,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044908919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:17,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935713505] [2022-03-15 15:54:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:17,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:17,982 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) [2022-03-15 15:54:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:54:18,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:54:18,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:18,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:54:18,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:54:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:18,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:18,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:54:18,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:18,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:54:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935713505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:18,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:18,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:54:18,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746432551] [2022-03-15 15:54:18,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:54:18,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:54:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:54:18,339 INFO L87 Difference]: Start difference. First operand 64 states and 129 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:18,419 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2022-03-15 15:54:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:18,420 INFO L225 Difference]: With dead ends: 86 [2022-03-15 15:54:18,420 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:54:18,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:54:18,420 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:18,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:54:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-03-15 15:54:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 63 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 128 transitions. [2022-03-15 15:54:18,422 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 128 transitions. Word has length 15 [2022-03-15 15:54:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:18,422 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 128 transitions. [2022-03-15 15:54:18,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 128 transitions. [2022-03-15 15:54:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:18,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:18,422 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:18,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:18,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:18,623 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1335515678, now seen corresponding path program 37 times [2022-03-15 15:54:18,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:18,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525764638] [2022-03-15 15:54:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:18,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525764638] [2022-03-15 15:54:18,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525764638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:18,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773675942] [2022-03-15 15:54:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:18,681 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) [2022-03-15 15:54:18,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:54:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:18,913 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:18,913 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 13 treesize of output 12 [2022-03-15 15:54:18,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773675942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:18,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:18,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:54:18,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801092564] [2022-03-15 15:54:18,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:18,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:54:18,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:54:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:54:18,919 INFO L87 Difference]: Start difference. First operand 64 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:19,003 INFO L93 Difference]: Finished difference Result 77 states and 152 transitions. [2022-03-15 15:54:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:54:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:19,004 INFO L225 Difference]: With dead ends: 77 [2022-03-15 15:54:19,004 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:54:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:19,004 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:19,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:54:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2022-03-15 15:54:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2022-03-15 15:54:19,005 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2022-03-15 15:54:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:19,006 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2022-03-15 15:54:19,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:54:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2022-03-15 15:54:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:19,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:19,006 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:19,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:19,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:19,219 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1466714608, now seen corresponding path program 38 times [2022-03-15 15:54:19,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:19,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995961732] [2022-03-15 15:54:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:19,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:19,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995961732] [2022-03-15 15:54:19,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995961732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:19,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446549431] [2022-03-15 15:54:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:19,257 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) [2022-03-15 15:54:19,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:54:19,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:19,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:54:19,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:54:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:19,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:19,507 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 47 treesize of output 45 [2022-03-15 15:54:19,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:19,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-15 15:54:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446549431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:19,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:19,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:54:19,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279166333] [2022-03-15 15:54:19,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:19,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:54:19,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:19,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:54:19,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:54:19,618 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:19,708 INFO L93 Difference]: Finished difference Result 70 states and 135 transitions. [2022-03-15 15:54:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:54:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:19,709 INFO L225 Difference]: With dead ends: 70 [2022-03-15 15:54:19,709 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 15:54:19,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:54:19,709 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:19,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 15:54:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-03-15 15:54:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2022-03-15 15:54:19,711 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2022-03-15 15:54:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:19,711 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2022-03-15 15:54:19,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2022-03-15 15:54:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:54:19,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:19,711 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:19,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:19,927 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,SelfDestructingSolverStorable43 [2022-03-15 15:54:19,927 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -183523120, now seen corresponding path program 39 times [2022-03-15 15:54:19,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:19,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270323395] [2022-03-15 15:54:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:19,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:19,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270323395] [2022-03-15 15:54:19,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270323395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:19,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339450383] [2022-03-15 15:54:19,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:19,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:19,971 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) [2022-03-15 15:54:19,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:54:20,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:20,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:54:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:20,199 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:20,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:54:20,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:54:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339450383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:20,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:20,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 15:54:20,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489515300] [2022-03-15 15:54:20,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:20,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:54:20,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:54:20,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:54:20,207 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:20,278 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2022-03-15 15:54:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:54:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:54:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:20,278 INFO L225 Difference]: With dead ends: 71 [2022-03-15 15:54:20,278 INFO L226 Difference]: Without dead ends: 71 [2022-03-15 15:54:20,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:54:20,279 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:20,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 35 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-15 15:54:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2022-03-15 15:54:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0) internal successors, (110), 55 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 110 transitions. [2022-03-15 15:54:20,280 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 110 transitions. Word has length 15 [2022-03-15 15:54:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 110 transitions. [2022-03-15 15:54:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2022-03-15 15:54:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:20,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:20,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:20,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:20,496 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,SelfDestructingSolverStorable44 [2022-03-15 15:54:20,497 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash 391859001, now seen corresponding path program 40 times [2022-03-15 15:54:20,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:20,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088161582] [2022-03-15 15:54:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:20,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088161582] [2022-03-15 15:54:20,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088161582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:20,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806306832] [2022-03-15 15:54:20,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:20,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:20,755 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) [2022-03-15 15:54:20,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:54:20,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:54:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:21,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 250 treesize of output 214 [2022-03-15 15:54:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:21,811 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 190 [2022-03-15 15:54:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:23,506 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:23,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 276 [2022-03-15 15:54:23,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 226 [2022-03-15 15:54:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:23,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806306832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:23,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:23,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:23,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127393057] [2022-03-15 15:54:23,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:23,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:23,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:23,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:23,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:23,659 INFO L87 Difference]: Start difference. First operand 56 states and 110 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:24,250 INFO L93 Difference]: Finished difference Result 104 states and 216 transitions. [2022-03-15 15:54:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:54:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:24,251 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:54:24,251 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:54:24,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:24,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:24,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 145 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 225 Unchecked, 0.1s Time] [2022-03-15 15:54:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:54:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-03-15 15:54:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2022-03-15 15:54:24,253 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 16 [2022-03-15 15:54:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2022-03-15 15:54:24,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2022-03-15 15:54:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:24,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:24,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:24,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:24,454 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,SelfDestructingSolverStorable45 [2022-03-15 15:54:24,454 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 564348891, now seen corresponding path program 41 times [2022-03-15 15:54:24,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:24,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882157305] [2022-03-15 15:54:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:24,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882157305] [2022-03-15 15:54:24,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882157305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:24,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785081491] [2022-03-15 15:54:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:24,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:24,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:24,740 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) [2022-03-15 15:54:24,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:54:24,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:24,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:25,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 217 treesize of output 187 [2022-03-15 15:54:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:25,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 163 [2022-03-15 15:54:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:25,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:27,259 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:27,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 208 [2022-03-15 15:54:27,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 183 [2022-03-15 15:54:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:27,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785081491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:27,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:27,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:27,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305051030] [2022-03-15 15:54:27,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:27,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:27,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:27,467 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:28,271 INFO L93 Difference]: Finished difference Result 116 states and 237 transitions. [2022-03-15 15:54:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:28,272 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:54:28,272 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 15:54:28,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:28,273 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:28,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 137 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 303 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-15 15:54:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 15:54:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2022-03-15 15:54:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2022-03-15 15:54:28,277 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 16 [2022-03-15 15:54:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:28,277 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2022-03-15 15:54:28,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2022-03-15 15:54:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:28,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:28,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:28,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 15:54:28,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 15:54:28,478 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 563754245, now seen corresponding path program 42 times [2022-03-15 15:54:28,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:28,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127594079] [2022-03-15 15:54:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:28,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:28,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127594079] [2022-03-15 15:54:28,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127594079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:28,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239172651] [2022-03-15 15:54:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:28,672 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) [2022-03-15 15:54:28,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:54:28,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:54:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:54:28,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:29,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 316 treesize of output 272 [2022-03-15 15:54:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:29,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 276 treesize of output 232 [2022-03-15 15:54:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:31,568 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:31,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 328 [2022-03-15 15:54:31,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 290 [2022-03-15 15:54:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239172651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:31,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:31,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:31,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125031105] [2022-03-15 15:54:31,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:31,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:31,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:31,691 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:31,918 INFO L93 Difference]: Finished difference Result 110 states and 228 transitions. [2022-03-15 15:54:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:31,918 INFO L225 Difference]: With dead ends: 110 [2022-03-15 15:54:31,918 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:54:31,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:31,919 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:31,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-03-15 15:54:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:54:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2022-03-15 15:54:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2022-03-15 15:54:31,920 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 16 [2022-03-15 15:54:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:31,921 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2022-03-15 15:54:31,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2022-03-15 15:54:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:31,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:31,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:31,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:32,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:32,129 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 545320219, now seen corresponding path program 43 times [2022-03-15 15:54:32,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:32,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660389188] [2022-03-15 15:54:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:32,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:32,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660389188] [2022-03-15 15:54:32,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660389188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:32,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872373158] [2022-03-15 15:54:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:32,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:32,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:32,334 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) [2022-03-15 15:54:32,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:54:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,198 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 151 [2022-03-15 15:54:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 155 treesize of output 135 [2022-03-15 15:54:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:34,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:34,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 207 [2022-03-15 15:54:34,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 182 [2022-03-15 15:54:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:34,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872373158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:34,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:34,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:34,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946468450] [2022-03-15 15:54:34,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:34,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:34,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:34,996 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:35,561 INFO L93 Difference]: Finished difference Result 112 states and 230 transitions. [2022-03-15 15:54:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:35,562 INFO L225 Difference]: With dead ends: 112 [2022-03-15 15:54:35,562 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:54:35,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:35,563 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:35,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 116 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 253 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-15 15:54:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:54:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2022-03-15 15:54:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-03-15 15:54:35,564 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 16 [2022-03-15 15:54:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-03-15 15:54:35,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-03-15 15:54:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:35,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:35,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:35,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:35,782 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,SelfDestructingSolverStorable48 [2022-03-15 15:54:35,782 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2086994389, now seen corresponding path program 44 times [2022-03-15 15:54:35,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:35,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048831740] [2022-03-15 15:54:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:36,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:36,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048831740] [2022-03-15 15:54:36,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048831740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:36,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413537935] [2022-03-15 15:54:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:36,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:36,007 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) [2022-03-15 15:54:36,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:54:36,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:36,949 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 247 [2022-03-15 15:54:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:36,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 251 treesize of output 217 [2022-03-15 15:54:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:37,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:38,553 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:38,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 278 [2022-03-15 15:54:38,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 235 [2022-03-15 15:54:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:39,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413537935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:39,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:39,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:39,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510568094] [2022-03-15 15:54:39,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:39,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:39,096 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:39,724 INFO L93 Difference]: Finished difference Result 118 states and 235 transitions. [2022-03-15 15:54:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:54:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:39,726 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:54:39,726 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 15:54:39,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:39,727 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:39,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 189 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 331 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-03-15 15:54:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 15:54:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2022-03-15 15:54:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 76 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 150 transitions. [2022-03-15 15:54:39,728 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 150 transitions. Word has length 16 [2022-03-15 15:54:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 150 transitions. [2022-03-15 15:54:39,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 150 transitions. [2022-03-15 15:54:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:39,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:39,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:39,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 15:54:39,943 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,SelfDestructingSolverStorable49 [2022-03-15 15:54:39,944 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1243151529, now seen corresponding path program 45 times [2022-03-15 15:54:39,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:39,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843338444] [2022-03-15 15:54:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:40,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843338444] [2022-03-15 15:54:40,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843338444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:40,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014903852] [2022-03-15 15:54:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:40,162 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) [2022-03-15 15:54:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:54:40,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:54:40,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:54:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:40,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:40,936 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 155 [2022-03-15 15:54:40,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:40,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 159 treesize of output 137 [2022-03-15 15:54:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:42,742 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:42,742 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 302 treesize of output 271 [2022-03-15 15:54:42,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 239 [2022-03-15 15:54:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:42,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014903852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:42,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:42,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:42,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894024699] [2022-03-15 15:54:42,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:42,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:42,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:42,892 INFO L87 Difference]: Start difference. First operand 77 states and 150 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:43,427 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2022-03-15 15:54:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:54:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:43,432 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:54:43,432 INFO L226 Difference]: Without dead ends: 115 [2022-03-15 15:54:43,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:43,435 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:43,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 134 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-15 15:54:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-15 15:54:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2022-03-15 15:54:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.972972972972973) internal successors, (146), 74 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 146 transitions. [2022-03-15 15:54:43,437 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 146 transitions. Word has length 16 [2022-03-15 15:54:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:43,437 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 146 transitions. [2022-03-15 15:54:43,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 146 transitions. [2022-03-15 15:54:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:43,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:43,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:43,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 15:54:43,638 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,SelfDestructingSolverStorable50 [2022-03-15 15:54:43,638 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1243746175, now seen corresponding path program 46 times [2022-03-15 15:54:43,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:43,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506894004] [2022-03-15 15:54:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:43,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:43,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506894004] [2022-03-15 15:54:43,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506894004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:43,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123674926] [2022-03-15 15:54:43,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:43,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:43,831 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) [2022-03-15 15:54:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:54:43,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:43,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:43,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:43,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 311 treesize of output 261 [2022-03-15 15:54:44,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 227 [2022-03-15 15:54:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:45,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:46,628 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:46,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 293 [2022-03-15 15:54:46,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 258 [2022-03-15 15:54:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:46,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123674926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:46,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:46,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:46,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342373868] [2022-03-15 15:54:46,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:46,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:46,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:46,778 INFO L87 Difference]: Start difference. First operand 75 states and 146 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:47,143 INFO L93 Difference]: Finished difference Result 120 states and 234 transitions. [2022-03-15 15:54:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:54:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:47,144 INFO L225 Difference]: With dead ends: 120 [2022-03-15 15:54:47,144 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 15:54:47,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:47,144 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:47,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 136 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-03-15 15:54:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 15:54:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 79. [2022-03-15 15:54:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.935897435897436) internal successors, (151), 78 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 151 transitions. [2022-03-15 15:54:47,146 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 151 transitions. Word has length 16 [2022-03-15 15:54:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 151 transitions. [2022-03-15 15:54:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 151 transitions. [2022-03-15 15:54:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:47,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:47,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:47,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:47,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:47,366 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1262180201, now seen corresponding path program 47 times [2022-03-15 15:54:47,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:47,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755339161] [2022-03-15 15:54:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:47,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:47,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755339161] [2022-03-15 15:54:47,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755339161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:47,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551120273] [2022-03-15 15:54:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:47,588 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) [2022-03-15 15:54:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:54:47,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:48,543 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 179 [2022-03-15 15:54:48,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:48,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 161 [2022-03-15 15:54:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:50,147 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:50,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 385 treesize of output 338 [2022-03-15 15:54:50,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 293 [2022-03-15 15:54:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:50,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551120273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:50,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:50,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:50,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549000393] [2022-03-15 15:54:50,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:50,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:50,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:50,785 INFO L87 Difference]: Start difference. First operand 79 states and 151 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:51,382 INFO L93 Difference]: Finished difference Result 116 states and 231 transitions. [2022-03-15 15:54:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:51,382 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:54:51,383 INFO L226 Difference]: Without dead ends: 110 [2022-03-15 15:54:51,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:51,383 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:51,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 162 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 333 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-03-15 15:54:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-15 15:54:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2022-03-15 15:54:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 76 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 147 transitions. [2022-03-15 15:54:51,384 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 147 transitions. Word has length 16 [2022-03-15 15:54:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 147 transitions. [2022-03-15 15:54:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 147 transitions. [2022-03-15 15:54:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:51,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:51,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:51,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:51,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:51,601 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:51,601 INFO L85 PathProgramCache]: Analyzing trace with hash 400472487, now seen corresponding path program 48 times [2022-03-15 15:54:51,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:51,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290432260] [2022-03-15 15:54:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:51,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:51,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290432260] [2022-03-15 15:54:51,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290432260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:51,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022575479] [2022-03-15 15:54:51,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:51,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:51,797 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) [2022-03-15 15:54:51,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:54:51,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:54:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:54:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:52,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 316 treesize of output 260 [2022-03-15 15:54:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:52,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 264 treesize of output 232 [2022-03-15 15:54:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:54,646 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:54,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 289 [2022-03-15 15:54:54,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 259 [2022-03-15 15:54:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:54,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022575479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:54,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:54,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:54,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262248772] [2022-03-15 15:54:54,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:54,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:54,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:54,761 INFO L87 Difference]: Start difference. First operand 77 states and 147 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:55,212 INFO L93 Difference]: Finished difference Result 126 states and 241 transitions. [2022-03-15 15:54:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:55,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:55,212 INFO L225 Difference]: With dead ends: 126 [2022-03-15 15:54:55,212 INFO L226 Difference]: Without dead ends: 123 [2022-03-15 15:54:55,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:55,213 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:55,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 175 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 311 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-03-15 15:54:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-15 15:54:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2022-03-15 15:54:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 78 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 149 transitions. [2022-03-15 15:54:55,215 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 149 transitions. Word has length 16 [2022-03-15 15:54:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:55,215 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 149 transitions. [2022-03-15 15:54:55,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 149 transitions. [2022-03-15 15:54:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:55,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:55,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:55,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 15:54:55,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:55,431 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash -300543623, now seen corresponding path program 49 times [2022-03-15 15:54:55,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:55,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204802305] [2022-03-15 15:54:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:55,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:55,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204802305] [2022-03-15 15:54:55,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204802305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:55,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716378382] [2022-03-15 15:54:55,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:55,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:55,683 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) [2022-03-15 15:54:55,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:54:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:54:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:56,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:56,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 287 [2022-03-15 15:54:56,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:56,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 291 treesize of output 259 [2022-03-15 15:54:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:57,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:58,859 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:54:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 344 [2022-03-15 15:54:58,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 345 treesize of output 293 [2022-03-15 15:54:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:59,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716378382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:59,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:59,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:54:59,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047347274] [2022-03-15 15:54:59,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:59,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:54:59,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:54:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:54:59,028 INFO L87 Difference]: Start difference. First operand 79 states and 149 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:59,839 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2022-03-15 15:54:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:54:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:59,840 INFO L225 Difference]: With dead ends: 119 [2022-03-15 15:54:59,840 INFO L226 Difference]: Without dead ends: 103 [2022-03-15 15:54:59,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:59,841 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:59,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 151 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-03-15 15:54:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-15 15:54:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2022-03-15 15:54:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 79 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 151 transitions. [2022-03-15 15:54:59,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 151 transitions. Word has length 16 [2022-03-15 15:54:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:59,842 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 151 transitions. [2022-03-15 15:54:59,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 151 transitions. [2022-03-15 15:54:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:54:59,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:59,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:59,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:00,055 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,SelfDestructingSolverStorable54 [2022-03-15 15:55:00,055 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1814653685, now seen corresponding path program 50 times [2022-03-15 15:55:00,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:00,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022582440] [2022-03-15 15:55:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:00,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:00,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022582440] [2022-03-15 15:55:00,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022582440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:00,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604267973] [2022-03-15 15:55:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:00,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:00,305 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) [2022-03-15 15:55:00,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:55:00,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:00,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:01,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 245 [2022-03-15 15:55:01,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:01,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 213 [2022-03-15 15:55:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:01,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:03,163 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:55:03,163 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 348 treesize of output 313 [2022-03-15 15:55:03,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 262 [2022-03-15 15:55:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604267973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:03,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:03,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:55:03,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028618461] [2022-03-15 15:55:03,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:03,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:03,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:03,297 INFO L87 Difference]: Start difference. First operand 80 states and 151 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:04,453 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2022-03-15 15:55:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:04,454 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:04,454 INFO L225 Difference]: With dead ends: 119 [2022-03-15 15:55:04,454 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:55:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:04,455 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 171 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 397 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-03-15 15:55:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:55:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2022-03-15 15:55:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.9125) internal successors, (153), 80 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 153 transitions. [2022-03-15 15:55:04,456 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 153 transitions. Word has length 16 [2022-03-15 15:55:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:04,456 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 153 transitions. [2022-03-15 15:55:04,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 153 transitions. [2022-03-15 15:55:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:04,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:04,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:04,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 15:55:04,671 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,SelfDestructingSolverStorable55 [2022-03-15 15:55:04,671 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1580797447, now seen corresponding path program 51 times [2022-03-15 15:55:04,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:04,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829301138] [2022-03-15 15:55:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:04,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:04,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829301138] [2022-03-15 15:55:04,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829301138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:04,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662704046] [2022-03-15 15:55:04,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:04,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:04,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:04,906 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) [2022-03-15 15:55:04,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:55:04,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:55:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:06,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 248 [2022-03-15 15:55:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:06,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 252 treesize of output 206 [2022-03-15 15:55:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:06,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:08,153 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:55:08,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 395 treesize of output 350 [2022-03-15 15:55:08,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 299 [2022-03-15 15:55:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:08,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662704046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:08,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:08,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:55:08,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323223263] [2022-03-15 15:55:08,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:08,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:08,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:08,307 INFO L87 Difference]: Start difference. First operand 81 states and 153 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:09,541 INFO L93 Difference]: Finished difference Result 156 states and 299 transitions. [2022-03-15 15:55:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:55:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:09,542 INFO L225 Difference]: With dead ends: 156 [2022-03-15 15:55:09,542 INFO L226 Difference]: Without dead ends: 130 [2022-03-15 15:55:09,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:55:09,542 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:09,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 336 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-15 15:55:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-15 15:55:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2022-03-15 15:55:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 167 transitions. [2022-03-15 15:55:09,544 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 167 transitions. Word has length 16 [2022-03-15 15:55:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:09,544 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 167 transitions. [2022-03-15 15:55:09,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 167 transitions. [2022-03-15 15:55:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:09,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:09,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:09,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 15:55:09,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 15:55:09,745 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1252701351, now seen corresponding path program 52 times [2022-03-15 15:55:09,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:09,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860004536] [2022-03-15 15:55:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:09,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:09,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860004536] [2022-03-15 15:55:09,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860004536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:09,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485870050] [2022-03-15 15:55:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:09,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:09,993 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) [2022-03-15 15:55:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:55:10,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:10,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 163 [2022-03-15 15:55:10,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:10,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 167 treesize of output 141 [2022-03-15 15:55:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:11,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:13,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:13,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 527 treesize of output 461 [2022-03-15 15:55:13,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:13,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 455 treesize of output 385 [2022-03-15 15:55:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485870050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:13,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:13,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:55:13,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713778330] [2022-03-15 15:55:13,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:13,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:13,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:13,905 INFO L87 Difference]: Start difference. First operand 85 states and 167 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,445 INFO L93 Difference]: Finished difference Result 136 states and 262 transitions. [2022-03-15 15:55:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,446 INFO L225 Difference]: With dead ends: 136 [2022-03-15 15:55:14,446 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 15:55:14,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:14,446 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 424 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-15 15:55:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 15:55:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2022-03-15 15:55:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2022-03-15 15:55:14,448 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 16 [2022-03-15 15:55:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,448 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2022-03-15 15:55:14,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2022-03-15 15:55:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:14,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:14,661 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,SelfDestructingSolverStorable57 [2022-03-15 15:55:14,661 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -927068637, now seen corresponding path program 53 times [2022-03-15 15:55:14,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:14,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873477862] [2022-03-15 15:55:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:14,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873477862] [2022-03-15 15:55:14,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873477862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:14,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93623514] [2022-03-15 15:55:14,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:14,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:14,863 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) [2022-03-15 15:55:14,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:55:14,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:15,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 311 treesize of output 259 [2022-03-15 15:55:15,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:15,721 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 263 treesize of output 225 [2022-03-15 15:55:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:18,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:18,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 472 treesize of output 414 [2022-03-15 15:55:18,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:18,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 408 treesize of output 334 [2022-03-15 15:55:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93623514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:18,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:18,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:55:18,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398200555] [2022-03-15 15:55:18,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:18,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:18,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:18,982 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:19,766 INFO L93 Difference]: Finished difference Result 135 states and 261 transitions. [2022-03-15 15:55:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:19,766 INFO L225 Difference]: With dead ends: 135 [2022-03-15 15:55:19,766 INFO L226 Difference]: Without dead ends: 125 [2022-03-15 15:55:19,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:19,767 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:19,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 186 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 366 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-15 15:55:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-15 15:55:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 88. [2022-03-15 15:55:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0) internal successors, (174), 87 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 174 transitions. [2022-03-15 15:55:19,768 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 174 transitions. Word has length 16 [2022-03-15 15:55:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 174 transitions. [2022-03-15 15:55:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 174 transitions. [2022-03-15 15:55:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:19,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:19,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:19,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:19,985 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,SelfDestructingSolverStorable58 [2022-03-15 15:55:19,985 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash -755173393, now seen corresponding path program 54 times [2022-03-15 15:55:19,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:19,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119529002] [2022-03-15 15:55:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:19,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:20,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119529002] [2022-03-15 15:55:20,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119529002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:20,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646251038] [2022-03-15 15:55:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:20,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:20,177 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) [2022-03-15 15:55:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:55:20,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:55:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:55:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:21,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:21,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 189 [2022-03-15 15:55:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:21,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 167 [2022-03-15 15:55:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:23,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:23,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 297 [2022-03-15 15:55:23,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:23,111 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 304 treesize of output 270 [2022-03-15 15:55:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:23,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646251038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:23,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:23,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:55:23,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527329600] [2022-03-15 15:55:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:23,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:23,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:23,543 INFO L87 Difference]: Start difference. First operand 88 states and 174 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:24,215 INFO L93 Difference]: Finished difference Result 130 states and 251 transitions. [2022-03-15 15:55:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:55:24,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:24,216 INFO L225 Difference]: With dead ends: 130 [2022-03-15 15:55:24,216 INFO L226 Difference]: Without dead ends: 127 [2022-03-15 15:55:24,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:24,216 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:24,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 174 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 444 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-15 15:55:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-15 15:55:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2022-03-15 15:55:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 89 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 176 transitions. [2022-03-15 15:55:24,218 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 176 transitions. Word has length 16 [2022-03-15 15:55:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:24,218 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 176 transitions. [2022-03-15 15:55:24,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 176 transitions. [2022-03-15 15:55:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:24,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:24,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:24,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:24,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 15:55:24,433 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -27552473, now seen corresponding path program 55 times [2022-03-15 15:55:24,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:24,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438151812] [2022-03-15 15:55:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:24,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438151812] [2022-03-15 15:55:24,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438151812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:24,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819431462] [2022-03-15 15:55:24,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:24,642 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) [2022-03-15 15:55:24,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:55:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:25,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:25,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:55:25,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:25,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 179 treesize of output 153 [2022-03-15 15:55:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:25,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:27,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:27,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 419 treesize of output 365 [2022-03-15 15:55:27,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:27,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 333 [2022-03-15 15:55:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819431462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:27,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:27,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:55:27,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157859643] [2022-03-15 15:55:27,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:27,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:27,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:27,845 INFO L87 Difference]: Start difference. First operand 90 states and 176 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:30,453 INFO L93 Difference]: Finished difference Result 250 states and 439 transitions. [2022-03-15 15:55:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:30,454 INFO L225 Difference]: With dead ends: 250 [2022-03-15 15:55:30,454 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 15:55:30,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:55:30,454 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:30,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 260 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 616 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-03-15 15:55:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 15:55:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 93. [2022-03-15 15:55:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2022-03-15 15:55:30,456 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 16 [2022-03-15 15:55:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:30,456 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2022-03-15 15:55:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2022-03-15 15:55:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:30,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:30,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:30,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:30,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,666 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1939761169, now seen corresponding path program 56 times [2022-03-15 15:55:30,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:30,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004298690] [2022-03-15 15:55:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:30,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:30,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004298690] [2022-03-15 15:55:30,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004298690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:30,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764558136] [2022-03-15 15:55:30,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:30,842 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) [2022-03-15 15:55:30,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:55:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:55:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:31,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-03-15 15:55:31,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 164 [2022-03-15 15:55:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:33,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:33,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 356 [2022-03-15 15:55:33,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:33,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 312 [2022-03-15 15:55:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764558136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:33,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:33,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:55:33,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635064270] [2022-03-15 15:55:33,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:33,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:55:33,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:55:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:33,534 INFO L87 Difference]: Start difference. First operand 93 states and 186 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:34,439 INFO L93 Difference]: Finished difference Result 180 states and 349 transitions. [2022-03-15 15:55:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:55:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:34,440 INFO L225 Difference]: With dead ends: 180 [2022-03-15 15:55:34,440 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:55:34,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:34,440 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:34,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 200 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:55:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 101. [2022-03-15 15:55:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.09) internal successors, (209), 100 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 209 transitions. [2022-03-15 15:55:34,442 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 209 transitions. Word has length 16 [2022-03-15 15:55:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:34,442 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 209 transitions. [2022-03-15 15:55:34,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 209 transitions. [2022-03-15 15:55:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:34,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:34,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:34,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:34,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,659 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash 35466151, now seen corresponding path program 57 times [2022-03-15 15:55:34,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:34,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388118638] [2022-03-15 15:55:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:34,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388118638] [2022-03-15 15:55:34,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388118638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:34,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399727445] [2022-03-15 15:55:34,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:34,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:34,855 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) [2022-03-15 15:55:34,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:55:34,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:55:34,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:34,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:35,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 236 [2022-03-15 15:55:35,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 216 [2022-03-15 15:55:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:37,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:37,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 314 [2022-03-15 15:55:37,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:37,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 282 [2022-03-15 15:55:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:38,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399727445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:38,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:38,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:55:38,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704117713] [2022-03-15 15:55:38,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:38,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:55:38,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:55:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:38,344 INFO L87 Difference]: Start difference. First operand 101 states and 209 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:39,539 INFO L93 Difference]: Finished difference Result 260 states and 494 transitions. [2022-03-15 15:55:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:39,540 INFO L225 Difference]: With dead ends: 260 [2022-03-15 15:55:39,540 INFO L226 Difference]: Without dead ends: 234 [2022-03-15 15:55:39,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:39,540 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:39,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 222 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-15 15:55:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 108. [2022-03-15 15:55:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.177570093457944) internal successors, (233), 107 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 233 transitions. [2022-03-15 15:55:39,543 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 233 transitions. Word has length 16 [2022-03-15 15:55:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:39,543 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 233 transitions. [2022-03-15 15:55:39,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 233 transitions. [2022-03-15 15:55:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:39,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:39,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:39,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 15:55:39,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:39,758 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2136312007, now seen corresponding path program 58 times [2022-03-15 15:55:39,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:39,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112328535] [2022-03-15 15:55:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112328535] [2022-03-15 15:55:39,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112328535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015044928] [2022-03-15 15:55:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:39,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:39,962 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) [2022-03-15 15:55:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:55:40,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:40,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:40,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 221 treesize of output 187 [2022-03-15 15:55:40,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:40,783 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 167 [2022-03-15 15:55:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:42,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:42,607 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 486 treesize of output 440 [2022-03-15 15:55:42,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:42,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 434 treesize of output 372 [2022-03-15 15:55:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015044928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:43,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:43,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:55:43,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177722705] [2022-03-15 15:55:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:43,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:43,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:43,166 INFO L87 Difference]: Start difference. First operand 108 states and 233 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:43,880 INFO L93 Difference]: Finished difference Result 225 states and 447 transitions. [2022-03-15 15:55:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:43,881 INFO L225 Difference]: With dead ends: 225 [2022-03-15 15:55:43,881 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:55:43,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:43,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:43,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 312 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 552 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-03-15 15:55:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:55:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 123. [2022-03-15 15:55:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.262295081967213) internal successors, (276), 122 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 276 transitions. [2022-03-15 15:55:43,884 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 276 transitions. Word has length 16 [2022-03-15 15:55:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:43,884 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 276 transitions. [2022-03-15 15:55:43,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 276 transitions. [2022-03-15 15:55:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:43,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:43,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:43,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:44,095 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,SelfDestructingSolverStorable63 [2022-03-15 15:55:44,095 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash -21114699, now seen corresponding path program 59 times [2022-03-15 15:55:44,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:44,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418004559] [2022-03-15 15:55:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:44,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418004559] [2022-03-15 15:55:44,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418004559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:44,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173371366] [2022-03-15 15:55:44,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:44,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:44,283 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) [2022-03-15 15:55:44,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:55:44,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:45,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:45,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-03-15 15:55:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:45,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 177 [2022-03-15 15:55:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:47,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 513 treesize of output 447 [2022-03-15 15:55:47,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 441 treesize of output 383 [2022-03-15 15:55:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:47,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173371366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:47,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:47,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:55:47,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522997093] [2022-03-15 15:55:47,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:47,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:47,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:47,782 INFO L87 Difference]: Start difference. First operand 123 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:48,621 INFO L93 Difference]: Finished difference Result 233 states and 467 transitions. [2022-03-15 15:55:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:55:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:48,622 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:55:48,622 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:55:48,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:48,622 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:48,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 272 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 398 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-03-15 15:55:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:55:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 127. [2022-03-15 15:55:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.2936507936507935) internal successors, (289), 126 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 289 transitions. [2022-03-15 15:55:48,624 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 289 transitions. Word has length 16 [2022-03-15 15:55:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:48,624 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 289 transitions. [2022-03-15 15:55:48,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 289 transitions. [2022-03-15 15:55:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:48,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:48,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:48,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 15:55:48,831 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,SelfDestructingSolverStorable64 [2022-03-15 15:55:48,831 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:48,832 INFO L85 PathProgramCache]: Analyzing trace with hash 150780545, now seen corresponding path program 60 times [2022-03-15 15:55:48,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:48,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794067141] [2022-03-15 15:55:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:48,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:49,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:49,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794067141] [2022-03-15 15:55:49,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794067141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:49,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748061295] [2022-03-15 15:55:49,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:49,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:49,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:49,041 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) [2022-03-15 15:55:49,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:55:49,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:55:49,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:55:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:49,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 181 [2022-03-15 15:55:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:49,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 161 [2022-03-15 15:55:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:51,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:51,922 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 466 treesize of output 424 [2022-03-15 15:55:51,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:51,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 431 treesize of output 377 [2022-03-15 15:55:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748061295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:52,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:52,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:55:52,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743946063] [2022-03-15 15:55:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:55:52,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:55:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:55:52,388 INFO L87 Difference]: Start difference. First operand 127 states and 289 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:52,831 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2022-03-15 15:55:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:52,832 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:55:52,832 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 15:55:52,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:52,832 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:52,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 138 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 346 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-03-15 15:55:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 15:55:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2022-03-15 15:55:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2022-03-15 15:55:52,834 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 16 [2022-03-15 15:55:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2022-03-15 15:55:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2022-03-15 15:55:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:52,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:52,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:52,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 15:55:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,035 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 878401465, now seen corresponding path program 61 times [2022-03-15 15:55:53,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:53,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297380748] [2022-03-15 15:55:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:53,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:53,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297380748] [2022-03-15 15:55:53,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297380748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:53,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721173463] [2022-03-15 15:55:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:53,239 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) [2022-03-15 15:55:53,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:55:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:53,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:53,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 250 treesize of output 216 [2022-03-15 15:55:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:53,895 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 190 [2022-03-15 15:55:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:54,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:56,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 528 treesize of output 486 [2022-03-15 15:55:56,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,095 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 480 treesize of output 414 [2022-03-15 15:55:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:56,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721173463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:56,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:56,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:55:56,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895882360] [2022-03-15 15:55:56,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:56,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:56,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:56,677 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:58,146 INFO L93 Difference]: Finished difference Result 317 states and 616 transitions. [2022-03-15 15:55:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:55:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:58,147 INFO L225 Difference]: With dead ends: 317 [2022-03-15 15:55:58,147 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 15:55:58,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:55:58,148 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 120 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:58,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 330 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 699 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-03-15 15:55:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 15:55:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 128. [2022-03-15 15:55:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2022-03-15 15:55:58,151 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 16 [2022-03-15 15:55:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:58,151 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2022-03-15 15:55:58,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2022-03-15 15:55:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:58,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:58,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:58,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 15:55:58,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:58,364 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1932462645, now seen corresponding path program 62 times [2022-03-15 15:55:58,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:58,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210172085] [2022-03-15 15:55:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:58,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210172085] [2022-03-15 15:55:58,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210172085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910004968] [2022-03-15 15:55:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:58,595 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) [2022-03-15 15:55:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:55:58,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:58,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:58,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:59,480 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 210 treesize of output 180 [2022-03-15 15:55:59,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:59,483 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 160 [2022-03-15 15:55:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:01,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:01,112 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 371 treesize of output 337 [2022-03-15 15:56:01,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:01,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 303 [2022-03-15 15:56:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910004968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:01,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:01,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:56:01,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589189726] [2022-03-15 15:56:01,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:01,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:01,676 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:02,399 INFO L93 Difference]: Finished difference Result 214 states and 447 transitions. [2022-03-15 15:56:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:02,400 INFO L225 Difference]: With dead ends: 214 [2022-03-15 15:56:02,400 INFO L226 Difference]: Without dead ends: 194 [2022-03-15 15:56:02,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:02,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:02,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 483 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-03-15 15:56:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-15 15:56:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2022-03-15 15:56:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.343283582089552) internal successors, (314), 134 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2022-03-15 15:56:02,403 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 16 [2022-03-15 15:56:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:02,403 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2022-03-15 15:56:02,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2022-03-15 15:56:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:02,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:02,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:02,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:02,604 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,SelfDestructingSolverStorable67 [2022-03-15 15:56:02,604 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1462988487, now seen corresponding path program 63 times [2022-03-15 15:56:02,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:02,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497731619] [2022-03-15 15:56:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:02,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497731619] [2022-03-15 15:56:02,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497731619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:02,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200430610] [2022-03-15 15:56:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:02,770 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) [2022-03-15 15:56:02,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:56:02,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:03,270 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 203 treesize of output 175 [2022-03-15 15:56:03,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 157 [2022-03-15 15:56:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:05,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:05,285 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 382 treesize of output 342 [2022-03-15 15:56:05,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:05,305 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 338 treesize of output 306 [2022-03-15 15:56:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:06,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200430610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:06,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:06,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:56:06,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281735834] [2022-03-15 15:56:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:06,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:06,022 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:07,108 INFO L93 Difference]: Finished difference Result 286 states and 572 transitions. [2022-03-15 15:56:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:07,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:07,109 INFO L225 Difference]: With dead ends: 286 [2022-03-15 15:56:07,109 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 15:56:07,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:07,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:07,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 284 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 15:56:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 136. [2022-03-15 15:56:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.3333333333333335) internal successors, (315), 135 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 315 transitions. [2022-03-15 15:56:07,112 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 315 transitions. Word has length 16 [2022-03-15 15:56:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:07,112 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 315 transitions. [2022-03-15 15:56:07,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 315 transitions. [2022-03-15 15:56:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:07,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:07,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:07,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 15:56:07,313 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,SelfDestructingSolverStorable68 [2022-03-15 15:56:07,313 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash -387277331, now seen corresponding path program 64 times [2022-03-15 15:56:07,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:07,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851706137] [2022-03-15 15:56:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:07,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:07,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851706137] [2022-03-15 15:56:07,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851706137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:07,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414749574] [2022-03-15 15:56:07,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:07,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:07,481 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) [2022-03-15 15:56:07,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:56:07,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:08,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:08,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 204 treesize of output 176 [2022-03-15 15:56:08,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:08,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 156 [2022-03-15 15:56:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:08,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:09,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:09,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 267 [2022-03-15 15:56:09,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:09,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 247 [2022-03-15 15:56:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:10,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414749574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:10,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:10,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:56:10,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556529597] [2022-03-15 15:56:10,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:10,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:10,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:10,713 INFO L87 Difference]: Start difference. First operand 136 states and 315 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:12,678 INFO L93 Difference]: Finished difference Result 256 states and 514 transitions. [2022-03-15 15:56:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:12,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:12,680 INFO L225 Difference]: With dead ends: 256 [2022-03-15 15:56:12,680 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:56:12,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:56:12,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:12,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 211 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 550 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-15 15:56:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:56:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2022-03-15 15:56:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.3550724637681157) internal successors, (325), 138 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 325 transitions. [2022-03-15 15:56:12,682 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 325 transitions. Word has length 16 [2022-03-15 15:56:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:12,683 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 325 transitions. [2022-03-15 15:56:12,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 325 transitions. [2022-03-15 15:56:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:12,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:12,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:12,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:12,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:12,895 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash -981328685, now seen corresponding path program 65 times [2022-03-15 15:56:12,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:12,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415426293] [2022-03-15 15:56:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:13,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415426293] [2022-03-15 15:56:13,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415426293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:13,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102529302] [2022-03-15 15:56:13,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:13,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:13,056 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) [2022-03-15 15:56:13,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:56:13,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:13,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-03-15 15:56:13,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 205 [2022-03-15 15:56:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:15,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:15,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 304 [2022-03-15 15:56:15,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:15,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 274 [2022-03-15 15:56:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102529302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:15,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:15,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:56:15,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707386531] [2022-03-15 15:56:15,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:15,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:15,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:15,968 INFO L87 Difference]: Start difference. First operand 139 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:17,185 INFO L93 Difference]: Finished difference Result 217 states and 451 transitions. [2022-03-15 15:56:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:17,186 INFO L225 Difference]: With dead ends: 217 [2022-03-15 15:56:17,186 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:56:17,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:56:17,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:17,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 175 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:56:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2022-03-15 15:56:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.354609929078014) internal successors, (332), 141 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) [2022-03-15 15:56:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 332 transitions. [2022-03-15 15:56:17,188 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 332 transitions. Word has length 16 [2022-03-15 15:56:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:17,189 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 332 transitions. [2022-03-15 15:56:17,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 332 transitions. [2022-03-15 15:56:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:17,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:17,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:17,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 15:56:17,389 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,SelfDestructingSolverStorable70 [2022-03-15 15:56:17,389 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1399969863, now seen corresponding path program 66 times [2022-03-15 15:56:17,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:17,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661093359] [2022-03-15 15:56:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:17,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:17,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661093359] [2022-03-15 15:56:17,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661093359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:17,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209929759] [2022-03-15 15:56:17,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:17,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:17,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:17,586 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) [2022-03-15 15:56:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:56:17,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:17,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:56:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:18,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:18,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 297 [2022-03-15 15:56:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:18,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 301 treesize of output 249 [2022-03-15 15:56:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:20,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:20,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 459 treesize of output 405 [2022-03-15 15:56:20,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:20,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 382 treesize of output 324 [2022-03-15 15:56:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:21,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209929759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:21,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:21,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:21,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553740738] [2022-03-15 15:56:21,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:21,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:21,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:21,282 INFO L87 Difference]: Start difference. First operand 142 states and 332 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:21,752 INFO L93 Difference]: Finished difference Result 177 states and 406 transitions. [2022-03-15 15:56:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:56:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:21,753 INFO L225 Difference]: With dead ends: 177 [2022-03-15 15:56:21,753 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:56:21,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:21,753 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:21,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 113 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 372 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-03-15 15:56:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:56:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2022-03-15 15:56:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.375) internal successors, (342), 144 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 342 transitions. [2022-03-15 15:56:21,755 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 342 transitions. Word has length 16 [2022-03-15 15:56:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:21,756 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 342 transitions. [2022-03-15 15:56:21,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 342 transitions. [2022-03-15 15:56:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:21,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:21,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:21,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 15:56:21,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:21,959 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1994021217, now seen corresponding path program 67 times [2022-03-15 15:56:21,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:21,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442163553] [2022-03-15 15:56:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:22,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442163553] [2022-03-15 15:56:22,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442163553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:22,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142848621] [2022-03-15 15:56:22,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:22,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:22,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:22,155 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) [2022-03-15 15:56:22,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:56:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:22,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:22,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 375 treesize of output 309 [2022-03-15 15:56:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 279 [2022-03-15 15:56:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:25,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:25,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 381 treesize of output 335 [2022-03-15 15:56:25,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:25,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 295 [2022-03-15 15:56:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142848621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:25,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:25,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:25,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273994115] [2022-03-15 15:56:25,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:25,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:25,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:25,667 INFO L87 Difference]: Start difference. First operand 145 states and 342 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:26,031 INFO L93 Difference]: Finished difference Result 219 states and 468 transitions. [2022-03-15 15:56:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:26,032 INFO L225 Difference]: With dead ends: 219 [2022-03-15 15:56:26,032 INFO L226 Difference]: Without dead ends: 201 [2022-03-15 15:56:26,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:26,032 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:26,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 207 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 323 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-03-15 15:56:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-15 15:56:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 147. [2022-03-15 15:56:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3904109589041096) internal successors, (349), 146 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 349 transitions. [2022-03-15 15:56:26,035 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 349 transitions. Word has length 16 [2022-03-15 15:56:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:26,035 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 349 transitions. [2022-03-15 15:56:26,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 349 transitions. [2022-03-15 15:56:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:26,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:26,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:26,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 15:56:26,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,251 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1765716277, now seen corresponding path program 68 times [2022-03-15 15:56:26,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:26,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952458159] [2022-03-15 15:56:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:26,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952458159] [2022-03-15 15:56:26,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952458159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006999971] [2022-03-15 15:56:26,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:26,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:26,440 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) [2022-03-15 15:56:26,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:56:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 210 treesize of output 180 [2022-03-15 15:56:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 160 [2022-03-15 15:56:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:28,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,865 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 336 treesize of output 306 [2022-03-15 15:56:28,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 270 [2022-03-15 15:56:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006999971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:29,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:29,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:29,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354729325] [2022-03-15 15:56:29,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:29,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:29,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:29,323 INFO L87 Difference]: Start difference. First operand 147 states and 349 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:29,913 INFO L93 Difference]: Finished difference Result 244 states and 500 transitions. [2022-03-15 15:56:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:29,915 INFO L225 Difference]: With dead ends: 244 [2022-03-15 15:56:29,915 INFO L226 Difference]: Without dead ends: 224 [2022-03-15 15:56:29,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:29,915 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:29,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 299 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 632 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-15 15:56:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-15 15:56:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 151. [2022-03-15 15:56:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3733333333333335) internal successors, (356), 150 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 356 transitions. [2022-03-15 15:56:29,917 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 356 transitions. Word has length 16 [2022-03-15 15:56:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:29,917 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 356 transitions. [2022-03-15 15:56:29,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 356 transitions. [2022-03-15 15:56:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:29,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:29,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:29,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:30,134 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,SelfDestructingSolverStorable73 [2022-03-15 15:56:30,134 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1286353447, now seen corresponding path program 69 times [2022-03-15 15:56:30,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:30,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132539139] [2022-03-15 15:56:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:30,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:30,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:30,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132539139] [2022-03-15 15:56:30,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132539139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:30,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785138942] [2022-03-15 15:56:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:30,310 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) [2022-03-15 15:56:30,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:56:30,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:56:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:31,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:31,198 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 167 [2022-03-15 15:56:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:31,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 171 treesize of output 149 [2022-03-15 15:56:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:33,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 508 treesize of output 446 [2022-03-15 15:56:33,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 440 treesize of output 370 [2022-03-15 15:56:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:33,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785138942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:33,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:33,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:33,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345048756] [2022-03-15 15:56:33,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:33,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:33,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:33,888 INFO L87 Difference]: Start difference. First operand 151 states and 356 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:34,506 INFO L93 Difference]: Finished difference Result 258 states and 546 transitions. [2022-03-15 15:56:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:56:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:34,509 INFO L225 Difference]: With dead ends: 258 [2022-03-15 15:56:34,509 INFO L226 Difference]: Without dead ends: 239 [2022-03-15 15:56:34,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:34,509 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:34,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 297 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 655 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-03-15 15:56:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-15 15:56:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2022-03-15 15:56:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.4161490683229814) internal successors, (389), 161 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 389 transitions. [2022-03-15 15:56:34,512 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 389 transitions. Word has length 16 [2022-03-15 15:56:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:34,512 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 389 transitions. [2022-03-15 15:56:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 389 transitions. [2022-03-15 15:56:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:34,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:34,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:34,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:34,713 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1458248691, now seen corresponding path program 70 times [2022-03-15 15:56:34,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:34,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358681494] [2022-03-15 15:56:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:34,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:34,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358681494] [2022-03-15 15:56:34,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358681494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:34,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216473215] [2022-03-15 15:56:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:34,911 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) [2022-03-15 15:56:34,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:56:34,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:34,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:35,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:35,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 275 treesize of output 233 [2022-03-15 15:56:35,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:35,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 205 [2022-03-15 15:56:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:37,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:37,894 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 505 treesize of output 455 [2022-03-15 15:56:37,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:37,904 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 449 treesize of output 379 [2022-03-15 15:56:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216473215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:38,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:38,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:38,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828078783] [2022-03-15 15:56:38,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:38,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:38,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:38,508 INFO L87 Difference]: Start difference. First operand 162 states and 389 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:39,066 INFO L93 Difference]: Finished difference Result 249 states and 527 transitions. [2022-03-15 15:56:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:39,067 INFO L225 Difference]: With dead ends: 249 [2022-03-15 15:56:39,067 INFO L226 Difference]: Without dead ends: 237 [2022-03-15 15:56:39,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:39,067 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:39,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 287 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 612 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-03-15 15:56:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-15 15:56:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2022-03-15 15:56:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.4076433121019107) internal successors, (378), 157 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 378 transitions. [2022-03-15 15:56:39,070 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 378 transitions. Word has length 16 [2022-03-15 15:56:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 378 transitions. [2022-03-15 15:56:39,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 378 transitions. [2022-03-15 15:56:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:39,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:39,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:39,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 15:56:39,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:39,275 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -893416541, now seen corresponding path program 71 times [2022-03-15 15:56:39,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:39,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016833398] [2022-03-15 15:56:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:39,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016833398] [2022-03-15 15:56:39,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016833398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:39,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229486734] [2022-03-15 15:56:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:39,504 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) [2022-03-15 15:56:39,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:56:39,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:40,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:40,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 236 [2022-03-15 15:56:40,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:40,492 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 214 [2022-03-15 15:56:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:40,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:42,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 447 treesize of output 397 [2022-03-15 15:56:42,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 391 treesize of output 337 [2022-03-15 15:56:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:43,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229486734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:43,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:43,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:56:43,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860289706] [2022-03-15 15:56:43,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:43,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:43,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:43,086 INFO L87 Difference]: Start difference. First operand 158 states and 378 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:43,794 INFO L93 Difference]: Finished difference Result 262 states and 557 transitions. [2022-03-15 15:56:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:43,796 INFO L225 Difference]: With dead ends: 262 [2022-03-15 15:56:43,796 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 15:56:43,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:43,796 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:43,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 289 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 597 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-03-15 15:56:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 15:56:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2022-03-15 15:56:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.4213836477987423) internal successors, (385), 159 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 385 transitions. [2022-03-15 15:56:43,799 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 385 transitions. Word has length 16 [2022-03-15 15:56:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:43,799 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 385 transitions. [2022-03-15 15:56:43,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 385 transitions. [2022-03-15 15:56:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:43,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:43,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:43,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:44,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:44,000 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -721521297, now seen corresponding path program 72 times [2022-03-15 15:56:44,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:44,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287067971] [2022-03-15 15:56:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:44,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:44,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287067971] [2022-03-15 15:56:44,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287067971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:44,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662357566] [2022-03-15 15:56:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:44,242 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) [2022-03-15 15:56:44,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:56:44,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:56:44,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:44,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:45,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 292 [2022-03-15 15:56:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:45,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 254 [2022-03-15 15:56:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:47,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 512 treesize of output 438 [2022-03-15 15:56:47,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 432 treesize of output 374 [2022-03-15 15:56:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662357566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:48,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:48,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:48,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639380833] [2022-03-15 15:56:48,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:48,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:48,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:48,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:48,168 INFO L87 Difference]: Start difference. First operand 160 states and 385 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:48,837 INFO L93 Difference]: Finished difference Result 264 states and 554 transitions. [2022-03-15 15:56:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:56:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:48,838 INFO L225 Difference]: With dead ends: 264 [2022-03-15 15:56:48,838 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:56:48,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:48,838 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:48,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 295 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 530 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-03-15 15:56:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:56:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 160. [2022-03-15 15:56:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.4150943396226414) internal successors, (384), 159 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 384 transitions. [2022-03-15 15:56:48,841 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 384 transitions. Word has length 16 [2022-03-15 15:56:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:48,841 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 384 transitions. [2022-03-15 15:56:48,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 384 transitions. [2022-03-15 15:56:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:48,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:48,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:48,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:49,052 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,SelfDestructingSolverStorable77 [2022-03-15 15:56:49,052 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 6099623, now seen corresponding path program 73 times [2022-03-15 15:56:49,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:49,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87065887] [2022-03-15 15:56:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:49,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87065887] [2022-03-15 15:56:49,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87065887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:49,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111306213] [2022-03-15 15:56:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:49,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:49,250 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) [2022-03-15 15:56:49,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:56:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:50,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 368 treesize of output 310 [2022-03-15 15:56:50,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:50,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 314 treesize of output 276 [2022-03-15 15:56:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:52,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:52,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 520 treesize of output 458 [2022-03-15 15:56:52,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:52,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 452 treesize of output 410 [2022-03-15 15:56:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111306213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:53,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:53,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:56:53,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673491126] [2022-03-15 15:56:53,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:53,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:56:53,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:56:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:53,106 INFO L87 Difference]: Start difference. First operand 160 states and 384 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:55,279 INFO L93 Difference]: Finished difference Result 366 states and 718 transitions. [2022-03-15 15:56:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:56:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:56:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:55,281 INFO L225 Difference]: With dead ends: 366 [2022-03-15 15:56:55,281 INFO L226 Difference]: Without dead ends: 326 [2022-03-15 15:56:55,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:56:55,281 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:55,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 247 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 521 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-03-15 15:56:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-15 15:56:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 158. [2022-03-15 15:56:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.4012738853503186) internal successors, (377), 157 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 377 transitions. [2022-03-15 15:56:55,284 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 377 transitions. Word has length 16 [2022-03-15 15:56:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:55,284 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 377 transitions. [2022-03-15 15:56:55,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 377 transitions. [2022-03-15 15:56:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:56:55,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:55,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:55,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:55,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,485 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1906109073, now seen corresponding path program 74 times [2022-03-15 15:56:55,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:55,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087876439] [2022-03-15 15:56:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:55,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087876439] [2022-03-15 15:56:55,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087876439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:55,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441491976] [2022-03-15 15:56:55,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:55,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:55,707 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) [2022-03-15 15:56:55,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:56:55,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:55,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:56:55,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:56,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 276 treesize of output 240 [2022-03-15 15:56:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:56,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 214 [2022-03-15 15:56:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:58,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:58,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 360 [2022-03-15 15:56:58,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:58,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 320 [2022-03-15 15:56:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:59,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441491976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:59,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:59,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:56:59,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522530286] [2022-03-15 15:56:59,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:59,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:59,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:59,064 INFO L87 Difference]: Start difference. First operand 158 states and 377 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:00,101 INFO L93 Difference]: Finished difference Result 233 states and 502 transitions. [2022-03-15 15:57:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:57:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:00,103 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:57:00,103 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:57:00,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:00,103 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:00,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 307 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 660 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-03-15 15:57:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:57:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 158. [2022-03-15 15:57:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.4012738853503186) internal successors, (377), 157 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 377 transitions. [2022-03-15 15:57:00,106 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 377 transitions. Word has length 16 [2022-03-15 15:57:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:00,106 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 377 transitions. [2022-03-15 15:57:00,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 377 transitions. [2022-03-15 15:57:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:00,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:00,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:00,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:00,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,315 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213829, now seen corresponding path program 75 times [2022-03-15 15:57:00,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:00,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451228722] [2022-03-15 15:57:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:00,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451228722] [2022-03-15 15:57:00,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451228722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:00,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006416544] [2022-03-15 15:57:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:00,473 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) [2022-03-15 15:57:00,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:57:00,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:57:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:57:00,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:00,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 167 [2022-03-15 15:57:00,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 149 [2022-03-15 15:57:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:03,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 344 [2022-03-15 15:57:03,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 289 [2022-03-15 15:57:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006416544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:03,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:03,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:03,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116422909] [2022-03-15 15:57:03,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:03,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:03,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:03,594 INFO L87 Difference]: Start difference. First operand 158 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:04,375 INFO L93 Difference]: Finished difference Result 233 states and 516 transitions. [2022-03-15 15:57:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:04,377 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:57:04,377 INFO L226 Difference]: Without dead ends: 219 [2022-03-15 15:57:04,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:04,377 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:04,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 163 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-15 15:57:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 161. [2022-03-15 15:57:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.43125) internal successors, (389), 160 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 389 transitions. [2022-03-15 15:57:04,384 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 389 transitions. Word has length 16 [2022-03-15 15:57:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:04,384 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 389 transitions. [2022-03-15 15:57:04,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 389 transitions. [2022-03-15 15:57:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:04,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:04,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:04,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 15:57:04,603 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,SelfDestructingSolverStorable80 [2022-03-15 15:57:04,603 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 69118247, now seen corresponding path program 76 times [2022-03-15 15:57:04,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:04,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88247077] [2022-03-15 15:57:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:04,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:04,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88247077] [2022-03-15 15:57:04,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88247077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:04,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219322409] [2022-03-15 15:57:04,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:04,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:04,768 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) [2022-03-15 15:57:04,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:57:04,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:04,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:05,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 205 [2022-03-15 15:57:05,189 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 209 treesize of output 187 [2022-03-15 15:57:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:06,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:07,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 475 treesize of output 417 [2022-03-15 15:57:07,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:07,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 413 treesize of output 375 [2022-03-15 15:57:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:08,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219322409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:08,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:08,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:08,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156392827] [2022-03-15 15:57:08,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:08,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:08,466 INFO L87 Difference]: Start difference. First operand 161 states and 389 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:09,888 INFO L93 Difference]: Finished difference Result 311 states and 651 transitions. [2022-03-15 15:57:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:57:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:09,889 INFO L225 Difference]: With dead ends: 311 [2022-03-15 15:57:09,889 INFO L226 Difference]: Without dead ends: 278 [2022-03-15 15:57:09,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:09,890 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:09,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 210 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-15 15:57:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 163. [2022-03-15 15:57:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2022-03-15 15:57:09,892 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 16 [2022-03-15 15:57:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:09,892 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2022-03-15 15:57:09,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2022-03-15 15:57:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:09,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:09,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:09,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 15:57:10,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:10,093 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1060160803, now seen corresponding path program 77 times [2022-03-15 15:57:10,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:10,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654005270] [2022-03-15 15:57:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:10,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654005270] [2022-03-15 15:57:10,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654005270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:10,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152629420] [2022-03-15 15:57:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:10,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:10,308 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) [2022-03-15 15:57:10,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:57:10,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:10,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:10,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:11,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:11,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 201 treesize of output 175 [2022-03-15 15:57:11,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:11,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-15 15:57:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:11,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:12,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:12,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 322 treesize of output 298 [2022-03-15 15:57:12,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:12,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 270 [2022-03-15 15:57:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152629420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:13,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:13,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:57:13,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757076692] [2022-03-15 15:57:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:13,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:13,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:13,094 INFO L87 Difference]: Start difference. First operand 163 states and 394 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:13,667 INFO L93 Difference]: Finished difference Result 251 states and 552 transitions. [2022-03-15 15:57:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:13,668 INFO L225 Difference]: With dead ends: 251 [2022-03-15 15:57:13,668 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 15:57:13,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:13,668 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:13,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 293 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 622 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-03-15 15:57:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 15:57:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 168. [2022-03-15 15:57:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.467065868263473) internal successors, (412), 167 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 412 transitions. [2022-03-15 15:57:13,671 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 412 transitions. Word has length 16 [2022-03-15 15:57:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:13,671 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 412 transitions. [2022-03-15 15:57:13,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 412 transitions. [2022-03-15 15:57:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:13,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:13,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:13,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 15:57:13,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:13,872 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1959676967, now seen corresponding path program 78 times [2022-03-15 15:57:13,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:13,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851643864] [2022-03-15 15:57:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:14,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851643864] [2022-03-15 15:57:14,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851643864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:14,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432555027] [2022-03-15 15:57:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:14,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:14,060 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) [2022-03-15 15:57:14,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:57:14,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:14,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 266 [2022-03-15 15:57:14,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 230 [2022-03-15 15:57:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:16,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:16,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 474 treesize of output 426 [2022-03-15 15:57:16,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:16,539 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 422 treesize of output 382 [2022-03-15 15:57:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432555027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:17,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:17,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:17,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707224245] [2022-03-15 15:57:17,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:17,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:17,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:17,396 INFO L87 Difference]: Start difference. First operand 168 states and 412 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:18,767 INFO L93 Difference]: Finished difference Result 326 states and 670 transitions. [2022-03-15 15:57:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:57:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:18,768 INFO L225 Difference]: With dead ends: 326 [2022-03-15 15:57:18,768 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 15:57:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:18,769 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:18,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 245 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 15:57:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 168. [2022-03-15 15:57:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4550898203592815) internal successors, (410), 167 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 410 transitions. [2022-03-15 15:57:18,771 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 410 transitions. Word has length 16 [2022-03-15 15:57:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:18,771 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 410 transitions. [2022-03-15 15:57:18,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 410 transitions. [2022-03-15 15:57:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:18,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:18,772 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:18,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 15:57:18,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,972 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash -118920227, now seen corresponding path program 79 times [2022-03-15 15:57:18,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:18,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223326823] [2022-03-15 15:57:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:19,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:19,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223326823] [2022-03-15 15:57:19,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223326823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928013778] [2022-03-15 15:57:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:19,025 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) [2022-03-15 15:57:19,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:57:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:19,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:57:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 40 [2022-03-15 15:57:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 34 [2022-03-15 15:57:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:19,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:19,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:19,367 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 18 treesize of output 22 [2022-03-15 15:57:19,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:19,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:57:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:19,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928013778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:19,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:19,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:57:19,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025357517] [2022-03-15 15:57:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:19,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:57:19,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:57:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:57:19,402 INFO L87 Difference]: Start difference. First operand 168 states and 410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:19,451 INFO L93 Difference]: Finished difference Result 178 states and 426 transitions. [2022-03-15 15:57:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:57:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:19,452 INFO L225 Difference]: With dead ends: 178 [2022-03-15 15:57:19,452 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:57:19,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:57:19,452 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:19,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-03-15 15:57:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:57:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-03-15 15:57:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 409 transitions. [2022-03-15 15:57:19,454 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 409 transitions. Word has length 16 [2022-03-15 15:57:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:19,454 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 409 transitions. [2022-03-15 15:57:19,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 409 transitions. [2022-03-15 15:57:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:19,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:19,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:19,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:57:19,671 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,SelfDestructingSolverStorable84 [2022-03-15 15:57:19,671 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1259579173, now seen corresponding path program 80 times [2022-03-15 15:57:19,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:19,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014782936] [2022-03-15 15:57:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:19,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014782936] [2022-03-15 15:57:19,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014782936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:19,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157359415] [2022-03-15 15:57:19,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:19,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:19,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:19,867 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) [2022-03-15 15:57:19,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:57:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:20,442 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 212 [2022-03-15 15:57:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:20,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 216 treesize of output 188 [2022-03-15 15:57:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:22,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:22,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 290 [2022-03-15 15:57:22,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:22,407 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 286 treesize of output 266 [2022-03-15 15:57:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157359415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:23,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:23,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:57:23,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543774538] [2022-03-15 15:57:23,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:23,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:23,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:23,032 INFO L87 Difference]: Start difference. First operand 168 states and 409 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:25,175 INFO L93 Difference]: Finished difference Result 298 states and 620 transitions. [2022-03-15 15:57:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:57:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:25,176 INFO L225 Difference]: With dead ends: 298 [2022-03-15 15:57:25,176 INFO L226 Difference]: Without dead ends: 258 [2022-03-15 15:57:25,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:57:25,177 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:25,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 225 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 584 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-03-15 15:57:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-15 15:57:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 170. [2022-03-15 15:57:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.455621301775148) internal successors, (415), 169 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 415 transitions. [2022-03-15 15:57:25,180 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 415 transitions. Word has length 16 [2022-03-15 15:57:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:25,180 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 415 transitions. [2022-03-15 15:57:25,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 415 transitions. [2022-03-15 15:57:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:25,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:25,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:25,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:25,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-15 15:57:25,399 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1853630527, now seen corresponding path program 81 times [2022-03-15 15:57:25,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:25,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696485392] [2022-03-15 15:57:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:25,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:25,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696485392] [2022-03-15 15:57:25,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696485392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:25,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295119029] [2022-03-15 15:57:25,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:25,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:25,581 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) [2022-03-15 15:57:25,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:57:25,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:57:25,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:26,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 278 [2022-03-15 15:57:26,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 240 [2022-03-15 15:57:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:27,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:27,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 298 [2022-03-15 15:57:27,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:27,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 272 [2022-03-15 15:57:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295119029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:28,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:28,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:28,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507664239] [2022-03-15 15:57:28,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:28,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:28,445 INFO L87 Difference]: Start difference. First operand 170 states and 415 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:29,871 INFO L93 Difference]: Finished difference Result 247 states and 540 transitions. [2022-03-15 15:57:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:29,872 INFO L225 Difference]: With dead ends: 247 [2022-03-15 15:57:29,872 INFO L226 Difference]: Without dead ends: 222 [2022-03-15 15:57:29,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:57:29,873 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 85 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:29,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-15 15:57:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 171. [2022-03-15 15:57:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4529411764705884) internal successors, (417), 170 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 417 transitions. [2022-03-15 15:57:29,875 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 417 transitions. Word has length 16 [2022-03-15 15:57:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:29,875 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 417 transitions. [2022-03-15 15:57:29,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 417 transitions. [2022-03-15 15:57:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:29,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:29,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:29,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:30,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-15 15:57:30,087 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:30,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2022695591, now seen corresponding path program 82 times [2022-03-15 15:57:30,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:30,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410948392] [2022-03-15 15:57:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:30,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:30,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410948392] [2022-03-15 15:57:30,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410948392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:30,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078802594] [2022-03-15 15:57:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:30,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:30,268 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) [2022-03-15 15:57:30,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:57:30,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:30,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 293 treesize of output 255 [2022-03-15 15:57:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 227 [2022-03-15 15:57:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:33,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:33,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 299 [2022-03-15 15:57:33,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:33,463 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 293 treesize of output 247 [2022-03-15 15:57:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078802594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:34,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:34,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:57:34,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205329023] [2022-03-15 15:57:34,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:34,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:34,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:34,730 INFO L87 Difference]: Start difference. First operand 171 states and 417 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:36,358 INFO L93 Difference]: Finished difference Result 278 states and 621 transitions. [2022-03-15 15:57:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:57:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:36,359 INFO L225 Difference]: With dead ends: 278 [2022-03-15 15:57:36,359 INFO L226 Difference]: Without dead ends: 259 [2022-03-15 15:57:36,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:36,359 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:36,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 211 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 495 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-03-15 15:57:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-15 15:57:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 176. [2022-03-15 15:57:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.474285714285714) internal successors, (433), 175 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 433 transitions. [2022-03-15 15:57:36,362 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 433 transitions. Word has length 16 [2022-03-15 15:57:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:36,362 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 433 transitions. [2022-03-15 15:57:36,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 433 transitions. [2022-03-15 15:57:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:36,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:36,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:36,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 15:57:36,579 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,SelfDestructingSolverStorable87 [2022-03-15 15:57:36,579 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1428644237, now seen corresponding path program 83 times [2022-03-15 15:57:36,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:36,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388961212] [2022-03-15 15:57:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:36,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388961212] [2022-03-15 15:57:36,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388961212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:36,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692808629] [2022-03-15 15:57:36,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:36,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:36,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:36,769 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) [2022-03-15 15:57:36,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:57:36,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:36,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:36,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:36,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:37,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 228 [2022-03-15 15:57:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 208 [2022-03-15 15:57:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:37,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:39,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:39,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 329 [2022-03-15 15:57:39,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:39,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 277 [2022-03-15 15:57:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692808629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:39,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:39,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:57:39,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947985095] [2022-03-15 15:57:39,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:39,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:39,671 INFO L87 Difference]: Start difference. First operand 176 states and 433 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:40,669 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2022-03-15 15:57:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:57:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:40,670 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:57:40,670 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 15:57:40,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:40,671 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:40,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 247 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 505 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-15 15:57:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 15:57:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2022-03-15 15:57:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.477272727272727) internal successors, (436), 176 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 436 transitions. [2022-03-15 15:57:40,673 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 436 transitions. Word has length 16 [2022-03-15 15:57:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:40,673 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 436 transitions. [2022-03-15 15:57:40,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 436 transitions. [2022-03-15 15:57:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:40,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:40,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:40,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 15:57:40,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:40,874 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 893414435, now seen corresponding path program 84 times [2022-03-15 15:57:40,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:40,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306116715] [2022-03-15 15:57:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:41,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306116715] [2022-03-15 15:57:41,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306116715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:41,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228885794] [2022-03-15 15:57:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:41,062 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) [2022-03-15 15:57:41,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:57:41,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:57:41,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:41,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 187 [2022-03-15 15:57:41,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 169 [2022-03-15 15:57:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:42,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:43,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:43,518 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 361 treesize of output 327 [2022-03-15 15:57:43,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:43,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 291 [2022-03-15 15:57:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228885794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:44,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:44,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:57:44,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406271314] [2022-03-15 15:57:44,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:44,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:44,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:44,124 INFO L87 Difference]: Start difference. First operand 177 states and 436 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:44,849 INFO L93 Difference]: Finished difference Result 271 states and 580 transitions. [2022-03-15 15:57:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:57:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:44,851 INFO L225 Difference]: With dead ends: 271 [2022-03-15 15:57:44,851 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 15:57:44,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:44,851 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:44,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 292 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 586 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2022-03-15 15:57:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 15:57:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2022-03-15 15:57:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.471590909090909) internal successors, (435), 176 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 435 transitions. [2022-03-15 15:57:44,854 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 435 transitions. Word has length 16 [2022-03-15 15:57:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:44,854 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 435 transitions. [2022-03-15 15:57:44,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 435 transitions. [2022-03-15 15:57:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:44,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:44,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:44,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 15:57:45,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,055 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1552756565, now seen corresponding path program 85 times [2022-03-15 15:57:45,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:45,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205267922] [2022-03-15 15:57:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:45,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:45,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205267922] [2022-03-15 15:57:45,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205267922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:45,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930905072] [2022-03-15 15:57:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:45,261 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) [2022-03-15 15:57:45,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:57:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:45,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 179 [2022-03-15 15:57:45,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 161 [2022-03-15 15:57:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:47,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:47,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 331 treesize of output 297 [2022-03-15 15:57:47,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:47,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 271 [2022-03-15 15:57:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930905072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:47,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:47,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:57:47,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993256665] [2022-03-15 15:57:47,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:47,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:47,946 INFO L87 Difference]: Start difference. First operand 177 states and 435 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:48,918 INFO L93 Difference]: Finished difference Result 298 states and 665 transitions. [2022-03-15 15:57:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:57:48,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:48,919 INFO L225 Difference]: With dead ends: 298 [2022-03-15 15:57:48,919 INFO L226 Difference]: Without dead ends: 278 [2022-03-15 15:57:48,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:48,919 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:48,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 213 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-15 15:57:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 184. [2022-03-15 15:57:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5027322404371586) internal successors, (458), 183 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 458 transitions. [2022-03-15 15:57:48,928 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 458 transitions. Word has length 16 [2022-03-15 15:57:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 458 transitions. [2022-03-15 15:57:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 458 transitions. [2022-03-15 15:57:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:48,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:48,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:49,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:49,141 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1842694567, now seen corresponding path program 86 times [2022-03-15 15:57:49,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:49,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911789340] [2022-03-15 15:57:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:49,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:49,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911789340] [2022-03-15 15:57:49,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911789340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:49,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843531470] [2022-03-15 15:57:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:49,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:49,306 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) [2022-03-15 15:57:49,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:57:49,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:49,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 241 [2022-03-15 15:57:49,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 217 [2022-03-15 15:57:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:50,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:51,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:51,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 393 treesize of output 361 [2022-03-15 15:57:51,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:51,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 357 treesize of output 321 [2022-03-15 15:57:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:52,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843531470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:52,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:52,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:57:52,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431932025] [2022-03-15 15:57:52,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:52,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:52,307 INFO L87 Difference]: Start difference. First operand 184 states and 458 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:53,607 INFO L93 Difference]: Finished difference Result 357 states and 769 transitions. [2022-03-15 15:57:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:57:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:53,608 INFO L225 Difference]: With dead ends: 357 [2022-03-15 15:57:53,608 INFO L226 Difference]: Without dead ends: 324 [2022-03-15 15:57:53,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:53,609 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:53,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 259 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:57:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-15 15:57:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 180. [2022-03-15 15:57:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.4972067039106145) internal successors, (447), 179 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 447 transitions. [2022-03-15 15:57:53,612 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 447 transitions. Word has length 16 [2022-03-15 15:57:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:53,612 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 447 transitions. [2022-03-15 15:57:53,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 447 transitions. [2022-03-15 15:57:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:53,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:53,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:53,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:53,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:53,821 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -766983411, now seen corresponding path program 87 times [2022-03-15 15:57:53,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:53,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182285647] [2022-03-15 15:57:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:53,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:53,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182285647] [2022-03-15 15:57:53,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182285647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:53,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478461458] [2022-03-15 15:57:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:53,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:53,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:53,990 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) [2022-03-15 15:57:53,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:57:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:54,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 400 treesize of output 334 [2022-03-15 15:57:54,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 338 treesize of output 296 [2022-03-15 15:57:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:55,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:56,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:56,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 311 [2022-03-15 15:57:56,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:56,483 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 307 treesize of output 287 [2022-03-15 15:57:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478461458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:57,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:57,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:57:57,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324618190] [2022-03-15 15:57:57,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:57,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:57,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:57,028 INFO L87 Difference]: Start difference. First operand 180 states and 447 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:59,260 INFO L93 Difference]: Finished difference Result 346 states and 742 transitions. [2022-03-15 15:57:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:57:59,260 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:57:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:59,261 INFO L225 Difference]: With dead ends: 346 [2022-03-15 15:57:59,261 INFO L226 Difference]: Without dead ends: 306 [2022-03-15 15:57:59,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:57:59,262 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:59,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 198 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-15 15:57:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 183. [2022-03-15 15:57:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.510989010989011) internal successors, (457), 182 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 457 transitions. [2022-03-15 15:57:59,264 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 457 transitions. Word has length 16 [2022-03-15 15:57:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:59,264 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 457 transitions. [2022-03-15 15:57:59,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 457 transitions. [2022-03-15 15:57:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:57:59,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:59,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:59,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:59,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:59,473 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1779675943, now seen corresponding path program 88 times [2022-03-15 15:57:59,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:59,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259947024] [2022-03-15 15:57:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:59,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259947024] [2022-03-15 15:57:59,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259947024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:59,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544035422] [2022-03-15 15:57:59,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:59,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:59,665 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) [2022-03-15 15:57:59,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:57:59,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:57:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:00,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 176 [2022-03-15 15:58:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:00,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 154 [2022-03-15 15:58:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:02,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:02,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 419 treesize of output 369 [2022-03-15 15:58:02,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:02,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 297 [2022-03-15 15:58:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544035422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:03,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:03,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:03,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075714518] [2022-03-15 15:58:03,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:03,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:03,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:03,089 INFO L87 Difference]: Start difference. First operand 183 states and 457 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:04,936 INFO L93 Difference]: Finished difference Result 295 states and 652 transitions. [2022-03-15 15:58:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:58:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:04,937 INFO L225 Difference]: With dead ends: 295 [2022-03-15 15:58:04,937 INFO L226 Difference]: Without dead ends: 262 [2022-03-15 15:58:04,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:58:04,937 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:04,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 144 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 481 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-03-15 15:58:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-15 15:58:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 185. [2022-03-15 15:58:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2022-03-15 15:58:04,941 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2022-03-15 15:58:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:04,941 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2022-03-15 15:58:04,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2022-03-15 15:58:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:04,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:04,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:04,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:05,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-15 15:58:05,151 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1921239999, now seen corresponding path program 89 times [2022-03-15 15:58:05,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:05,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476006359] [2022-03-15 15:58:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:05,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:05,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476006359] [2022-03-15 15:58:05,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476006359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:05,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776255722] [2022-03-15 15:58:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:05,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:05,411 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) [2022-03-15 15:58:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:58:05,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:05,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:06,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 282 [2022-03-15 15:58:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:06,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 236 [2022-03-15 15:58:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:08,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:08,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 517 treesize of output 455 [2022-03-15 15:58:08,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:08,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 449 treesize of output 375 [2022-03-15 15:58:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:08,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776255722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:08,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:08,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:08,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517791564] [2022-03-15 15:58:08,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:08,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:08,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:08,938 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:09,351 INFO L93 Difference]: Finished difference Result 213 states and 508 transitions. [2022-03-15 15:58:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:09,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:09,352 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:58:09,352 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:58:09,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:09,353 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:09,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 125 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:58:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:58:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2022-03-15 15:58:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5136612021857925) internal successors, (460), 183 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 460 transitions. [2022-03-15 15:58:09,355 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 460 transitions. Word has length 16 [2022-03-15 15:58:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:09,355 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 460 transitions. [2022-03-15 15:58:09,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 460 transitions. [2022-03-15 15:58:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:09,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:09,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:09,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:09,556 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,SelfDestructingSolverStorable94 [2022-03-15 15:58:09,556 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1386010197, now seen corresponding path program 90 times [2022-03-15 15:58:09,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:09,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458718154] [2022-03-15 15:58:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:09,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:09,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458718154] [2022-03-15 15:58:09,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458718154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:09,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869940257] [2022-03-15 15:58:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:09,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:09,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:09,737 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) [2022-03-15 15:58:09,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:58:09,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:58:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:10,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 319 treesize of output 267 [2022-03-15 15:58:10,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:10,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 235 [2022-03-15 15:58:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:12,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:12,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 311 [2022-03-15 15:58:12,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:12,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 305 treesize of output 279 [2022-03-15 15:58:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869940257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:12,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:12,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:12,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037328306] [2022-03-15 15:58:12,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:12,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:12,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:12,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:12,736 INFO L87 Difference]: Start difference. First operand 184 states and 460 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:13,203 INFO L93 Difference]: Finished difference Result 215 states and 510 transitions. [2022-03-15 15:58:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:13,204 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:58:13,204 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:58:13,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:13,204 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:13,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 128 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 347 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-15 15:58:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:58:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 183. [2022-03-15 15:58:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.510989010989011) internal successors, (457), 182 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 457 transitions. [2022-03-15 15:58:13,207 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 457 transitions. Word has length 16 [2022-03-15 15:58:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 457 transitions. [2022-03-15 15:58:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 457 transitions. [2022-03-15 15:58:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:13,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:13,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:13,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 15:58:13,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:13,423 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1625238425, now seen corresponding path program 91 times [2022-03-15 15:58:13,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:13,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642345622] [2022-03-15 15:58:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:13,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:13,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642345622] [2022-03-15 15:58:13,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642345622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:13,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76425239] [2022-03-15 15:58:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:13,629 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) [2022-03-15 15:58:13,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:58:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:14,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 275 [2022-03-15 15:58:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:14,434 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 241 [2022-03-15 15:58:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:15,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:16,259 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:16,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 209 [2022-03-15 15:58:16,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 184 [2022-03-15 15:58:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76425239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:16,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:16,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:16,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982837391] [2022-03-15 15:58:16,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:16,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:16,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:16,368 INFO L87 Difference]: Start difference. First operand 183 states and 457 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:18,735 INFO L93 Difference]: Finished difference Result 269 states and 642 transitions. [2022-03-15 15:58:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:58:18,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:18,736 INFO L225 Difference]: With dead ends: 269 [2022-03-15 15:58:18,736 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 15:58:18,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:58:18,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:18,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 132 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 361 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-03-15 15:58:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 15:58:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 187. [2022-03-15 15:58:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2022-03-15 15:58:18,739 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2022-03-15 15:58:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:18,739 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2022-03-15 15:58:18,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2022-03-15 15:58:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:18,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:18,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:18,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:18,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:18,940 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1647834973, now seen corresponding path program 92 times [2022-03-15 15:58:18,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:18,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885664385] [2022-03-15 15:58:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:19,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:19,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885664385] [2022-03-15 15:58:19,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885664385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:19,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007324765] [2022-03-15 15:58:19,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:19,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:19,150 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) [2022-03-15 15:58:19,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:58:19,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:19,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 208 treesize of output 178 [2022-03-15 15:58:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:19,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 182 treesize of output 156 [2022-03-15 15:58:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:22,235 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:22,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 230 [2022-03-15 15:58:22,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-03-15 15:58:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007324765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:22,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:22,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:22,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817216669] [2022-03-15 15:58:22,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:22,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:22,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:22,378 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:23,814 INFO L93 Difference]: Finished difference Result 240 states and 581 transitions. [2022-03-15 15:58:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:23,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:23,815 INFO L225 Difference]: With dead ends: 240 [2022-03-15 15:58:23,815 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 15:58:23,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:23,815 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:23,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 135 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 331 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-03-15 15:58:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 15:58:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 186. [2022-03-15 15:58:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.518918918918919) internal successors, (466), 185 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 466 transitions. [2022-03-15 15:58:23,818 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 466 transitions. Word has length 16 [2022-03-15 15:58:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:23,818 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 466 transitions. [2022-03-15 15:58:23,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 466 transitions. [2022-03-15 15:58:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:23,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:23,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:23,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 15:58:24,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:24,027 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:24,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2075677517, now seen corresponding path program 93 times [2022-03-15 15:58:24,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:24,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918125406] [2022-03-15 15:58:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:24,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:24,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:24,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918125406] [2022-03-15 15:58:24,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918125406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:24,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558990646] [2022-03-15 15:58:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:24,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:24,221 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) [2022-03-15 15:58:24,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:58:24,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:25,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:25,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:58:25,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:25,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 157 [2022-03-15 15:58:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:25,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:26,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:26,931 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 260 treesize of output 231 [2022-03-15 15:58:26,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 204 [2022-03-15 15:58:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558990646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:27,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:27,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:27,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556417651] [2022-03-15 15:58:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:27,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:27,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:27,049 INFO L87 Difference]: Start difference. First operand 186 states and 466 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:28,065 INFO L93 Difference]: Finished difference Result 236 states and 572 transitions. [2022-03-15 15:58:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:28,067 INFO L225 Difference]: With dead ends: 236 [2022-03-15 15:58:28,067 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 15:58:28,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:28,067 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:28,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 226 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-03-15 15:58:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 15:58:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 185. [2022-03-15 15:58:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2022-03-15 15:58:28,070 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2022-03-15 15:58:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:28,070 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2022-03-15 15:58:28,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2022-03-15 15:58:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:28,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:28,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:28,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:28,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,271 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1540447715, now seen corresponding path program 94 times [2022-03-15 15:58:28,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:28,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046277062] [2022-03-15 15:58:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:28,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:28,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046277062] [2022-03-15 15:58:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046277062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680380589] [2022-03-15 15:58:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:28,478 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) [2022-03-15 15:58:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:58:28,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:28,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:29,204 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 166 [2022-03-15 15:58:29,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:29,207 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 146 [2022-03-15 15:58:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:31,417 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:31,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 336 [2022-03-15 15:58:31,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 289 [2022-03-15 15:58:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680380589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:31,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:31,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:31,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416107072] [2022-03-15 15:58:31,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:31,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:31,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:31,570 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:32,415 INFO L93 Difference]: Finished difference Result 234 states and 566 transitions. [2022-03-15 15:58:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:58:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:32,416 INFO L225 Difference]: With dead ends: 234 [2022-03-15 15:58:32,416 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 15:58:32,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:32,417 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:32,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 330 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2022-03-15 15:58:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 15:58:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2022-03-15 15:58:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5136612021857925) internal successors, (460), 183 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 460 transitions. [2022-03-15 15:58:32,419 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 460 transitions. Word has length 16 [2022-03-15 15:58:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:32,419 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 460 transitions. [2022-03-15 15:58:32,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 460 transitions. [2022-03-15 15:58:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:58:32,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:32,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:32,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 15:58:32,636 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,SelfDestructingSolverStorable99 [2022-03-15 15:58:32,636 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1621846771, now seen corresponding path program 95 times [2022-03-15 15:58:32,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:32,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116464457] [2022-03-15 15:58:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:32,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:32,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116464457] [2022-03-15 15:58:32,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116464457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:32,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42246004] [2022-03-15 15:58:32,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:32,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:32,818 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) [2022-03-15 15:58:32,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:58:32,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:58:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:33,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:33,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 167 [2022-03-15 15:58:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:33,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-03-15 15:58:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:35,113 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:35,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 231 [2022-03-15 15:58:35,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 204 [2022-03-15 15:58:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:35,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42246004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:35,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:35,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:35,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124652644] [2022-03-15 15:58:35,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:35,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:35,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:35,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:35,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:35,241 INFO L87 Difference]: Start difference. First operand 184 states and 460 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:35,675 INFO L93 Difference]: Finished difference Result 247 states and 583 transitions. [2022-03-15 15:58:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:58:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:35,676 INFO L225 Difference]: With dead ends: 247 [2022-03-15 15:58:35,676 INFO L226 Difference]: Without dead ends: 240 [2022-03-15 15:58:35,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:35,676 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:35,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 137 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 241 Invalid, 0 Unknown, 231 Unchecked, 0.1s Time] [2022-03-15 15:58:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-15 15:58:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 186. [2022-03-15 15:58:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.502702702702703) internal successors, (463), 185 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 463 transitions. [2022-03-15 15:58:35,679 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 463 transitions. Word has length 16 [2022-03-15 15:58:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:35,679 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 463 transitions. [2022-03-15 15:58:35,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 463 transitions. [2022-03-15 15:58:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:35,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:35,680 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:35,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:35,896 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,SelfDestructingSolverStorable100 [2022-03-15 15:58:35,896 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 344292332, now seen corresponding path program 96 times [2022-03-15 15:58:35,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:35,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39998287] [2022-03-15 15:58:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:35,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:35,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39998287] [2022-03-15 15:58:35,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39998287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:35,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757587531] [2022-03-15 15:58:35,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:35,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:35,956 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) [2022-03-15 15:58:35,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:58:36,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:36,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:36,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:58:36,258 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 23 treesize of output 17 [2022-03-15 15:58:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:36,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:36,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-15 15:58:36,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-15 15:58:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757587531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:36,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:36,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:58:36,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62817996] [2022-03-15 15:58:36,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:58:36,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:58:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:58:36,391 INFO L87 Difference]: Start difference. First operand 186 states and 463 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:36,480 INFO L93 Difference]: Finished difference Result 228 states and 546 transitions. [2022-03-15 15:58:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:58:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:36,481 INFO L225 Difference]: With dead ends: 228 [2022-03-15 15:58:36,481 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 15:58:36,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:58:36,481 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:36,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 117 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-03-15 15:58:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 15:58:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2022-03-15 15:58:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.6097560975609757) internal successors, (428), 164 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 428 transitions. [2022-03-15 15:58:36,483 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 428 transitions. Word has length 17 [2022-03-15 15:58:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:36,483 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 428 transitions. [2022-03-15 15:58:36,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 428 transitions. [2022-03-15 15:58:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:36,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:36,484 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:36,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 15:58:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:58:36,699 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1634676752, now seen corresponding path program 97 times [2022-03-15 15:58:36,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:36,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320248931] [2022-03-15 15:58:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:36,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:36,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320248931] [2022-03-15 15:58:36,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320248931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:36,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950542198] [2022-03-15 15:58:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:36,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:36,762 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) [2022-03-15 15:58:36,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:58:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:36,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:37,067 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:37,067 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 13 treesize of output 12 [2022-03-15 15:58:37,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:58:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950542198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:37,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:37,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:58:37,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595482538] [2022-03-15 15:58:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:37,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:58:37,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:58:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:58:37,080 INFO L87 Difference]: Start difference. First operand 165 states and 428 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:37,235 INFO L93 Difference]: Finished difference Result 220 states and 539 transitions. [2022-03-15 15:58:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:37,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:37,236 INFO L225 Difference]: With dead ends: 220 [2022-03-15 15:58:37,236 INFO L226 Difference]: Without dead ends: 220 [2022-03-15 15:58:37,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:37,236 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:37,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 92 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-15 15:58:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 169. [2022-03-15 15:58:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5952380952380953) internal successors, (436), 168 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 436 transitions. [2022-03-15 15:58:37,238 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 436 transitions. Word has length 17 [2022-03-15 15:58:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:37,238 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 436 transitions. [2022-03-15 15:58:37,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 436 transitions. [2022-03-15 15:58:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:37,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:37,239 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:37,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:37,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 15:58:37,439 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -773834402, now seen corresponding path program 98 times [2022-03-15 15:58:37,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:37,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819362005] [2022-03-15 15:58:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:37,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819362005] [2022-03-15 15:58:37,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819362005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:37,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405279967] [2022-03-15 15:58:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:37,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:37,523 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) [2022-03-15 15:58:37,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:58:37,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:37,909 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:37,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:58:37,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:58:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405279967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:37,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:37,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:58:37,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863867755] [2022-03-15 15:58:37,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:37,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:37,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:37,923 INFO L87 Difference]: Start difference. First operand 169 states and 436 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:38,098 INFO L93 Difference]: Finished difference Result 205 states and 504 transitions. [2022-03-15 15:58:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:38,099 INFO L225 Difference]: With dead ends: 205 [2022-03-15 15:58:38,099 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:58:38,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:38,099 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:38,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 85 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:58:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2022-03-15 15:58:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5952380952380953) internal successors, (436), 168 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 436 transitions. [2022-03-15 15:58:38,102 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 436 transitions. Word has length 17 [2022-03-15 15:58:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:38,102 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 436 transitions. [2022-03-15 15:58:38,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 436 transitions. [2022-03-15 15:58:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:38,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:38,103 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:38,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 15:58:38,318 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,SelfDestructingSolverStorable103 [2022-03-15 15:58:38,318 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash 328670374, now seen corresponding path program 99 times [2022-03-15 15:58:38,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:38,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985091504] [2022-03-15 15:58:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:38,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:38,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985091504] [2022-03-15 15:58:38,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985091504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:38,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250897590] [2022-03-15 15:58:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:38,387 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) [2022-03-15 15:58:38,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:58:38,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:38,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:38,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:38,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:58:38,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:58:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250897590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:38,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:38,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:58:38,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492641124] [2022-03-15 15:58:38,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:38,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:38,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:38,745 INFO L87 Difference]: Start difference. First operand 169 states and 436 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:38,877 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2022-03-15 15:58:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:38,878 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:58:38,878 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:58:38,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:38,878 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:38,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 75 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:58:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2022-03-15 15:58:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5952380952380953) internal successors, (436), 168 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 436 transitions. [2022-03-15 15:58:38,880 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 436 transitions. Word has length 17 [2022-03-15 15:58:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:38,880 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 436 transitions. [2022-03-15 15:58:38,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 436 transitions. [2022-03-15 15:58:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:38,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:38,881 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:38,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 15:58:39,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:39,082 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2013666150, now seen corresponding path program 100 times [2022-03-15 15:58:39,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:39,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370590894] [2022-03-15 15:58:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:39,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370590894] [2022-03-15 15:58:39,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370590894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:39,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217941648] [2022-03-15 15:58:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:39,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:39,154 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) [2022-03-15 15:58:39,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:58:39,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:39,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:39,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:58:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:39,533 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:39,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:58:39,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:58:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217941648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:39,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:39,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:58:39,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180055732] [2022-03-15 15:58:39,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:39,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:39,542 INFO L87 Difference]: Start difference. First operand 169 states and 436 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:39,680 INFO L93 Difference]: Finished difference Result 198 states and 490 transitions. [2022-03-15 15:58:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:39,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:39,681 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:58:39,681 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 15:58:39,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:39,681 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:39,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 78 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 15:58:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2022-03-15 15:58:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.591715976331361) internal successors, (438), 169 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 438 transitions. [2022-03-15 15:58:39,683 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 438 transitions. Word has length 17 [2022-03-15 15:58:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:39,683 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 438 transitions. [2022-03-15 15:58:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 438 transitions. [2022-03-15 15:58:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:39,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:39,684 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:39,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:39,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:39,899 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 132119536, now seen corresponding path program 101 times [2022-03-15 15:58:39,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:39,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67860189] [2022-03-15 15:58:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:39,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67860189] [2022-03-15 15:58:39,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67860189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:39,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777880268] [2022-03-15 15:58:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:39,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:39,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:39,971 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) [2022-03-15 15:58:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:58:40,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:40,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:40,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:40,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:40,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777880268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:40,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:40,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:40,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533009212] [2022-03-15 15:58:40,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:40,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:40,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:40,370 INFO L87 Difference]: Start difference. First operand 170 states and 438 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:40,538 INFO L93 Difference]: Finished difference Result 194 states and 482 transitions. [2022-03-15 15:58:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:58:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:40,538 INFO L225 Difference]: With dead ends: 194 [2022-03-15 15:58:40,538 INFO L226 Difference]: Without dead ends: 194 [2022-03-15 15:58:40,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:40,539 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:40,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-15 15:58:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2022-03-15 15:58:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.591715976331361) internal successors, (438), 169 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 438 transitions. [2022-03-15 15:58:40,541 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 438 transitions. Word has length 17 [2022-03-15 15:58:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:40,541 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 438 transitions. [2022-03-15 15:58:40,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 438 transitions. [2022-03-15 15:58:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:40,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:40,541 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:40,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 15:58:40,742 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,SelfDestructingSolverStorable106 [2022-03-15 15:58:40,742 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1906192808, now seen corresponding path program 102 times [2022-03-15 15:58:40,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:40,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043467692] [2022-03-15 15:58:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:40,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:40,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043467692] [2022-03-15 15:58:40,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043467692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:40,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149290826] [2022-03-15 15:58:40,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:40,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:40,811 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) [2022-03-15 15:58:40,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:58:40,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:58:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:41,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:58:41,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:41,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 17 [2022-03-15 15:58:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:41,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:41,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:58:41,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:41,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-03-15 15:58:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149290826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:41,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:41,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:58:41,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757740730] [2022-03-15 15:58:41,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:41,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:41,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:41,364 INFO L87 Difference]: Start difference. First operand 170 states and 438 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:41,438 INFO L93 Difference]: Finished difference Result 186 states and 461 transitions. [2022-03-15 15:58:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:58:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:41,438 INFO L225 Difference]: With dead ends: 186 [2022-03-15 15:58:41,438 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 15:58:41,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:58:41,439 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:41,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:58:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 15:58:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2022-03-15 15:58:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5892857142857144) internal successors, (435), 168 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 435 transitions. [2022-03-15 15:58:41,441 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 435 transitions. Word has length 17 [2022-03-15 15:58:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:41,441 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 435 transitions. [2022-03-15 15:58:41,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 435 transitions. [2022-03-15 15:58:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:41,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:41,441 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:41,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:41,642 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,SelfDestructingSolverStorable107 [2022-03-15 15:58:41,642 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1234624312, now seen corresponding path program 103 times [2022-03-15 15:58:41,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:41,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289926990] [2022-03-15 15:58:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:41,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289926990] [2022-03-15 15:58:41,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289926990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:41,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826922847] [2022-03-15 15:58:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:41,732 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) [2022-03-15 15:58:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:58:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:42,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:42,095 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 20 treesize of output 24 [2022-03-15 15:58:42,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:42,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826922847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:42,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:42,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:58:42,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560282165] [2022-03-15 15:58:42,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:42,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:58:42,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:58:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:58:42,136 INFO L87 Difference]: Start difference. First operand 169 states and 435 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:42,285 INFO L93 Difference]: Finished difference Result 206 states and 505 transitions. [2022-03-15 15:58:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:58:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:42,286 INFO L225 Difference]: With dead ends: 206 [2022-03-15 15:58:42,286 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 15:58:42,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:42,286 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:42,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 15:58:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 170. [2022-03-15 15:58:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5857988165680474) internal successors, (437), 169 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 437 transitions. [2022-03-15 15:58:42,288 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 437 transitions. Word has length 17 [2022-03-15 15:58:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:42,288 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 437 transitions. [2022-03-15 15:58:42,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 437 transitions. [2022-03-15 15:58:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:42,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:42,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:42,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 15:58:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,489 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1107712212, now seen corresponding path program 104 times [2022-03-15 15:58:42,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:42,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646516992] [2022-03-15 15:58:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:42,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646516992] [2022-03-15 15:58:42,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646516992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:42,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626645288] [2022-03-15 15:58:42,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:42,569 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) [2022-03-15 15:58:42,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:58:42,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:42,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:42,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:58:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:42,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:42,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:42,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:42,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626645288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:42,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:42,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:58:42,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508590748] [2022-03-15 15:58:42,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:42,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:58:42,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:58:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:58:42,964 INFO L87 Difference]: Start difference. First operand 170 states and 437 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:43,100 INFO L93 Difference]: Finished difference Result 204 states and 502 transitions. [2022-03-15 15:58:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:58:43,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:43,100 INFO L225 Difference]: With dead ends: 204 [2022-03-15 15:58:43,101 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 15:58:43,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:43,101 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:43,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 82 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 15:58:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 171. [2022-03-15 15:58:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.5823529411764707) internal successors, (439), 170 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 439 transitions. [2022-03-15 15:58:43,103 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 439 transitions. Word has length 17 [2022-03-15 15:58:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:43,103 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 439 transitions. [2022-03-15 15:58:43,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 439 transitions. [2022-03-15 15:58:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:43,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:43,104 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:43,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:43,315 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash 932462898, now seen corresponding path program 105 times [2022-03-15 15:58:43,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:43,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961684380] [2022-03-15 15:58:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:43,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961684380] [2022-03-15 15:58:43,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961684380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:43,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591278164] [2022-03-15 15:58:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:43,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:43,413 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) [2022-03-15 15:58:43,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:58:43,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:58:43,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:43,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:43,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:43,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2022-03-15 15:58:43,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:43,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 30 [2022-03-15 15:58:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:43,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:43,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:58:43,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:43,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-03-15 15:58:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591278164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:43,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:43,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:43,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335307304] [2022-03-15 15:58:43,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:43,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:43,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:43,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:43,967 INFO L87 Difference]: Start difference. First operand 171 states and 439 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:44,109 INFO L93 Difference]: Finished difference Result 197 states and 493 transitions. [2022-03-15 15:58:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:44,109 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:58:44,109 INFO L226 Difference]: Without dead ends: 197 [2022-03-15 15:58:44,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:44,110 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:44,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 222 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-15 15:58:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-15 15:58:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2022-03-15 15:58:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.5823529411764707) internal successors, (439), 170 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 439 transitions. [2022-03-15 15:58:44,121 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 439 transitions. Word has length 17 [2022-03-15 15:58:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:44,121 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 439 transitions. [2022-03-15 15:58:44,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 439 transitions. [2022-03-15 15:58:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:44,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:44,121 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:44,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 15:58:44,321 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,SelfDestructingSolverStorable110 [2022-03-15 15:58:44,322 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash 906615850, now seen corresponding path program 106 times [2022-03-15 15:58:44,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:44,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115445056] [2022-03-15 15:58:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:44,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115445056] [2022-03-15 15:58:44,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115445056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:44,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122749603] [2022-03-15 15:58:44,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:44,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:44,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:44,391 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) [2022-03-15 15:58:44,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:58:44,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:44,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:44,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:44,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 19 [2022-03-15 15:58:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:44,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 17 [2022-03-15 15:58:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:44,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:44,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:58:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122749603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:44,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:44,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:44,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839487532] [2022-03-15 15:58:44,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:44,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:44,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:44,895 INFO L87 Difference]: Start difference. First operand 171 states and 439 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:45,133 INFO L93 Difference]: Finished difference Result 243 states and 548 transitions. [2022-03-15 15:58:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:58:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:45,134 INFO L225 Difference]: With dead ends: 243 [2022-03-15 15:58:45,134 INFO L226 Difference]: Without dead ends: 237 [2022-03-15 15:58:45,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:45,134 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:45,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 217 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 386 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-03-15 15:58:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-15 15:58:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 174. [2022-03-15 15:58:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.554913294797688) internal successors, (442), 173 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2022-03-15 15:58:45,137 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 17 [2022-03-15 15:58:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:45,137 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2022-03-15 15:58:45,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2022-03-15 15:58:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:45,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:45,137 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:45,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 15:58:45,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 15:58:45,338 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash -94073108, now seen corresponding path program 107 times [2022-03-15 15:58:45,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:45,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846670677] [2022-03-15 15:58:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:45,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:45,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846670677] [2022-03-15 15:58:45,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846670677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:45,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103173239] [2022-03-15 15:58:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:45,427 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) [2022-03-15 15:58:45,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:58:45,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:45,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:58:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:45,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:58:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:45,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:45,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:45,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:45,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:58:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103173239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:45,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:45,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:58:45,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981767197] [2022-03-15 15:58:45,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:45,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:58:45,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:58:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:45,838 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2022-03-15 15:58:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:46,079 INFO L93 Difference]: Finished difference Result 270 states and 615 transitions. [2022-03-15 15:58:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:58:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:46,080 INFO L225 Difference]: With dead ends: 270 [2022-03-15 15:58:46,080 INFO L226 Difference]: Without dead ends: 270 [2022-03-15 15:58:46,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:46,081 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:46,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 165 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 360 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-03-15 15:58:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-15 15:58:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 183. [2022-03-15 15:58:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5714285714285716) internal successors, (468), 182 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 468 transitions. [2022-03-15 15:58:46,083 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 468 transitions. Word has length 17 [2022-03-15 15:58:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:46,083 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 468 transitions. [2022-03-15 15:58:46,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2022-03-15 15:58:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 468 transitions. [2022-03-15 15:58:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:46,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:46,083 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:46,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:46,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 15:58:46,284 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1273154138, now seen corresponding path program 108 times [2022-03-15 15:58:46,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:46,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531540002] [2022-03-15 15:58:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:46,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:46,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531540002] [2022-03-15 15:58:46,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531540002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:46,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51221993] [2022-03-15 15:58:46,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:46,359 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) [2022-03-15 15:58:46,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:58:46,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:46,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:46,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2022-03-15 15:58:46,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:46,639 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:58:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:46,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:46,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:46,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:46,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 36 [2022-03-15 15:58:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51221993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:46,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:46,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:58:46,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400938186] [2022-03-15 15:58:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:46,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:58:46,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:58:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:58:46,852 INFO L87 Difference]: Start difference. First operand 183 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:47,324 INFO L93 Difference]: Finished difference Result 326 states and 713 transitions. [2022-03-15 15:58:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:58:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:47,325 INFO L225 Difference]: With dead ends: 326 [2022-03-15 15:58:47,325 INFO L226 Difference]: Without dead ends: 323 [2022-03-15 15:58:47,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:47,325 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:47,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 202 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 440 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-15 15:58:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-15 15:58:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 191. [2022-03-15 15:58:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.6210526315789475) internal successors, (498), 190 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 498 transitions. [2022-03-15 15:58:47,328 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 498 transitions. Word has length 17 [2022-03-15 15:58:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:47,328 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 498 transitions. [2022-03-15 15:58:47,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 498 transitions. [2022-03-15 15:58:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:47,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:47,328 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:47,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:47,545 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1881154212, now seen corresponding path program 109 times [2022-03-15 15:58:47,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:47,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523963146] [2022-03-15 15:58:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:47,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523963146] [2022-03-15 15:58:47,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523963146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:47,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311508730] [2022-03-15 15:58:47,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:47,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:47,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:47,656 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) [2022-03-15 15:58:47,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:58:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:47,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:47,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:47,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:47,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:47,888 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:58:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:48,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:48,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:48,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:48,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:58:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311508730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:48,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:48,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:58:48,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468066232] [2022-03-15 15:58:48,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:48,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:58:48,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:58:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:48,107 INFO L87 Difference]: Start difference. First operand 191 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:48,497 INFO L93 Difference]: Finished difference Result 294 states and 672 transitions. [2022-03-15 15:58:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:58:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:48,498 INFO L225 Difference]: With dead ends: 294 [2022-03-15 15:58:48,498 INFO L226 Difference]: Without dead ends: 289 [2022-03-15 15:58:48,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:58:48,498 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:48,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 126 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 360 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:58:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-15 15:58:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 196. [2022-03-15 15:58:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.5794871794871796) internal successors, (503), 195 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 503 transitions. [2022-03-15 15:58:48,501 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 503 transitions. Word has length 17 [2022-03-15 15:58:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:48,501 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 503 transitions. [2022-03-15 15:58:48,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 503 transitions. [2022-03-15 15:58:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:48,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:48,501 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:48,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 15:58:48,717 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,SelfDestructingSolverStorable114 [2022-03-15 15:58:48,717 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -373637974, now seen corresponding path program 110 times [2022-03-15 15:58:48,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:48,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437006166] [2022-03-15 15:58:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:48,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437006166] [2022-03-15 15:58:48,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437006166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:48,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953775158] [2022-03-15 15:58:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:48,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:48,792 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) [2022-03-15 15:58:48,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:58:48,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:48,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:49,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:49,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:58:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:49,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:58:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:49,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:49,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:49,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:49,209 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 38 treesize of output 36 [2022-03-15 15:58:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953775158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:49,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:49,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:58:49,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696987033] [2022-03-15 15:58:49,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:49,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:58:49,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:58:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:49,298 INFO L87 Difference]: Start difference. First operand 196 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:49,579 INFO L93 Difference]: Finished difference Result 261 states and 605 transitions. [2022-03-15 15:58:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:58:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:49,579 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:58:49,579 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 15:58:49,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:49,580 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 129 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:49,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 172 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 403 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:58:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 15:58:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 194. [2022-03-15 15:58:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.564766839378238) internal successors, (495), 193 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 495 transitions. [2022-03-15 15:58:49,582 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 495 transitions. Word has length 17 [2022-03-15 15:58:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:49,582 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 495 transitions. [2022-03-15 15:58:49,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 495 transitions. [2022-03-15 15:58:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:49,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:49,583 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:49,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 15:58:49,783 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,SelfDestructingSolverStorable115 [2022-03-15 15:58:49,783 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash 845865132, now seen corresponding path program 111 times [2022-03-15 15:58:49,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:49,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652359436] [2022-03-15 15:58:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:49,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652359436] [2022-03-15 15:58:49,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652359436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:49,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869325992] [2022-03-15 15:58:49,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:49,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:49,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:49,885 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) [2022-03-15 15:58:49,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:58:49,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:58:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:50,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:50,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:58:50,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:50,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:58:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:50,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:50,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:50,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:50,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-03-15 15:58:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869325992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:50,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:50,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:50,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734061476] [2022-03-15 15:58:50,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:50,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:50,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:50,337 INFO L87 Difference]: Start difference. First operand 194 states and 495 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:50,515 INFO L93 Difference]: Finished difference Result 258 states and 607 transitions. [2022-03-15 15:58:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:58:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:50,516 INFO L225 Difference]: With dead ends: 258 [2022-03-15 15:58:50,516 INFO L226 Difference]: Without dead ends: 258 [2022-03-15 15:58:50,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:50,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:50,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 123 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-15 15:58:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 196. [2022-03-15 15:58:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.5743589743589745) internal successors, (502), 195 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 502 transitions. [2022-03-15 15:58:50,519 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 502 transitions. Word has length 17 [2022-03-15 15:58:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 502 transitions. [2022-03-15 15:58:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 502 transitions. [2022-03-15 15:58:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:50,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:50,519 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:50,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:50,735 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,SelfDestructingSolverStorable116 [2022-03-15 15:58:50,736 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1408927054, now seen corresponding path program 112 times [2022-03-15 15:58:50,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:50,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232477691] [2022-03-15 15:58:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:50,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:50,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232477691] [2022-03-15 15:58:50,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232477691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:50,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101764419] [2022-03-15 15:58:50,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:50,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:50,804 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) [2022-03-15 15:58:50,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:58:50,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:50,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:50,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:50,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:50,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:50,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:58:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:51,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:51,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:51,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:51,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:58:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101764419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:51,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:51,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:51,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4492005] [2022-03-15 15:58:51,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:51,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:51,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:51,215 INFO L87 Difference]: Start difference. First operand 196 states and 502 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:51,468 INFO L93 Difference]: Finished difference Result 284 states and 663 transitions. [2022-03-15 15:58:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:58:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:51,469 INFO L225 Difference]: With dead ends: 284 [2022-03-15 15:58:51,469 INFO L226 Difference]: Without dead ends: 284 [2022-03-15 15:58:51,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:51,469 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:51,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 143 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-15 15:58:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 199. [2022-03-15 15:58:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.595959595959596) internal successors, (514), 198 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 514 transitions. [2022-03-15 15:58:51,477 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 514 transitions. Word has length 17 [2022-03-15 15:58:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:51,477 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 514 transitions. [2022-03-15 15:58:51,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 514 transitions. [2022-03-15 15:58:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:51,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:51,478 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:51,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:51,695 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,SelfDestructingSolverStorable117 [2022-03-15 15:58:51,695 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -260819476, now seen corresponding path program 113 times [2022-03-15 15:58:51,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:51,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642132140] [2022-03-15 15:58:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:51,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642132140] [2022-03-15 15:58:51,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642132140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:51,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050910525] [2022-03-15 15:58:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:51,827 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) [2022-03-15 15:58:51,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:58:51,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:51,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:51,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:52,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:58:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:52,087 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:58:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:52,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:52,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:52,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:52,171 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 38 treesize of output 36 [2022-03-15 15:58:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050910525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:52,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:52,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:58:52,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318046321] [2022-03-15 15:58:52,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:52,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:52,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:52,255 INFO L87 Difference]: Start difference. First operand 199 states and 514 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:52,432 INFO L93 Difference]: Finished difference Result 231 states and 563 transitions. [2022-03-15 15:58:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:58:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:52,432 INFO L225 Difference]: With dead ends: 231 [2022-03-15 15:58:52,432 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 15:58:52,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:52,433 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:52,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 116 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 15:58:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 201. [2022-03-15 15:58:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.58) internal successors, (516), 200 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 516 transitions. [2022-03-15 15:58:52,435 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 516 transitions. Word has length 17 [2022-03-15 15:58:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:52,435 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 516 transitions. [2022-03-15 15:58:52,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 516 transitions. [2022-03-15 15:58:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:52,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:52,436 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:52,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:52,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:52,647 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash -333215898, now seen corresponding path program 114 times [2022-03-15 15:58:52,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:52,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730149327] [2022-03-15 15:58:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:52,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730149327] [2022-03-15 15:58:52,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730149327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:52,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534604533] [2022-03-15 15:58:52,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:52,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:52,714 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) [2022-03-15 15:58:52,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:58:52,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:52,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:52,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:52,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:58:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:52,923 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:58:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:53,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:53,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:53,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:53,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:58:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534604533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:53,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:53,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:58:53,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969283346] [2022-03-15 15:58:53,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:53,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:58:53,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:53,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:58:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:58:53,094 INFO L87 Difference]: Start difference. First operand 201 states and 516 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:53,268 INFO L93 Difference]: Finished difference Result 233 states and 574 transitions. [2022-03-15 15:58:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:53,269 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:58:53,269 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 15:58:53,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:53,269 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:53,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 83 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 15:58:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 197. [2022-03-15 15:58:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.561224489795918) internal successors, (502), 196 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 502 transitions. [2022-03-15 15:58:53,272 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 502 transitions. Word has length 17 [2022-03-15 15:58:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 502 transitions. [2022-03-15 15:58:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 502 transitions. [2022-03-15 15:58:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:53,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:53,272 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:53,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 15:58:53,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,473 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1848079458, now seen corresponding path program 115 times [2022-03-15 15:58:53,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:53,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270584400] [2022-03-15 15:58:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:53,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270584400] [2022-03-15 15:58:53,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270584400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:53,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106744019] [2022-03-15 15:58:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:53,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:53,546 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) [2022-03-15 15:58:53,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:58:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:53,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:53,800 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:58:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:53,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:58:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:53,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:53,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:53,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:53,956 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 16 treesize of output 20 [2022-03-15 15:58:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106744019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:54,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:54,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:54,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4674737] [2022-03-15 15:58:54,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:54,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:54,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:54,005 INFO L87 Difference]: Start difference. First operand 197 states and 502 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:54,145 INFO L93 Difference]: Finished difference Result 236 states and 577 transitions. [2022-03-15 15:58:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:54,146 INFO L225 Difference]: With dead ends: 236 [2022-03-15 15:58:54,146 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 15:58:54,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:54,146 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:54,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-03-15 15:58:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 15:58:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 201. [2022-03-15 15:58:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.56) internal successors, (512), 200 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 512 transitions. [2022-03-15 15:58:54,149 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 512 transitions. Word has length 17 [2022-03-15 15:58:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 512 transitions. [2022-03-15 15:58:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 512 transitions. [2022-03-15 15:58:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:54,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:54,149 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:54,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 15:58:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:54,350 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1676184214, now seen corresponding path program 116 times [2022-03-15 15:58:54,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:54,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969426095] [2022-03-15 15:58:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:54,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969426095] [2022-03-15 15:58:54,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969426095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:54,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048609068] [2022-03-15 15:58:54,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:54,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:54,428 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) [2022-03-15 15:58:54,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:58:54,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:54,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:54,692 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 43 treesize of output 33 [2022-03-15 15:58:54,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:54,694 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:58:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:54,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:54,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:54,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:54,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048609068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:54,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:54,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:54,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062115579] [2022-03-15 15:58:54,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:54,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:54,883 INFO L87 Difference]: Start difference. First operand 201 states and 512 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:55,034 INFO L93 Difference]: Finished difference Result 252 states and 609 transitions. [2022-03-15 15:58:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:55,034 INFO L225 Difference]: With dead ends: 252 [2022-03-15 15:58:55,034 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:58:55,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:55,035 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:55,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 99 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-03-15 15:58:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:58:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2022-03-15 15:58:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.561224489795918) internal successors, (502), 196 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 502 transitions. [2022-03-15 15:58:55,037 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 502 transitions. Word has length 17 [2022-03-15 15:58:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:55,037 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 502 transitions. [2022-03-15 15:58:55,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 502 transitions. [2022-03-15 15:58:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:55,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:55,038 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:55,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:55,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:55,238 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 408575494, now seen corresponding path program 117 times [2022-03-15 15:58:55,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:55,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992009272] [2022-03-15 15:58:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:55,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992009272] [2022-03-15 15:58:55,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992009272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:55,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653762282] [2022-03-15 15:58:55,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:55,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:55,310 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) [2022-03-15 15:58:55,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:58:55,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:55,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:55,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:55,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:58:55,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:55,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:58:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:55,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:55,800 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 44 treesize of output 42 [2022-03-15 15:58:55,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:55,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 38 [2022-03-15 15:58:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653762282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:55,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:55,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:58:55,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977184439] [2022-03-15 15:58:55,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:55,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:58:55,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:58:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:58:55,900 INFO L87 Difference]: Start difference. First operand 197 states and 502 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:56,057 INFO L93 Difference]: Finished difference Result 226 states and 550 transitions. [2022-03-15 15:58:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:56,058 INFO L225 Difference]: With dead ends: 226 [2022-03-15 15:58:56,058 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:58:56,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:56,058 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:56,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 101 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 248 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-03-15 15:58:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:58:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 198. [2022-03-15 15:58:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.553299492385787) internal successors, (503), 197 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 503 transitions. [2022-03-15 15:58:56,060 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 503 transitions. Word has length 17 [2022-03-15 15:58:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 503 transitions. [2022-03-15 15:58:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 503 transitions. [2022-03-15 15:58:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:56,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:56,061 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:56,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 15:58:56,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:56,261 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -745574682, now seen corresponding path program 118 times [2022-03-15 15:58:56,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:56,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4996709] [2022-03-15 15:58:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4996709] [2022-03-15 15:58:56,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4996709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801570849] [2022-03-15 15:58:56,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:56,336 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) [2022-03-15 15:58:56,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:58:56,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:56,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:56,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:58:56,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:56,607 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:58:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:56,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:56,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801570849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:56,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:56,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:56,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702689091] [2022-03-15 15:58:56,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:56,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:56,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:56,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:56,829 INFO L87 Difference]: Start difference. First operand 198 states and 503 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:57,061 INFO L93 Difference]: Finished difference Result 238 states and 581 transitions. [2022-03-15 15:58:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:57,061 INFO L225 Difference]: With dead ends: 238 [2022-03-15 15:58:57,061 INFO L226 Difference]: Without dead ends: 238 [2022-03-15 15:58:57,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:57,062 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:57,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 205 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-15 15:58:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-15 15:58:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 198. [2022-03-15 15:58:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.553299492385787) internal successors, (503), 197 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 503 transitions. [2022-03-15 15:58:57,066 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 503 transitions. Word has length 17 [2022-03-15 15:58:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 503 transitions. [2022-03-15 15:58:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 503 transitions. [2022-03-15 15:58:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:57,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:57,067 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:57,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 15:58:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 15:58:57,267 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1207056090, now seen corresponding path program 119 times [2022-03-15 15:58:57,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:57,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671402710] [2022-03-15 15:58:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:57,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671402710] [2022-03-15 15:58:57,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671402710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:57,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956688226] [2022-03-15 15:58:57,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:57,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:57,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:57,342 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) [2022-03-15 15:58:57,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:58:57,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:57,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:57,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:57,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:57,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:57,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:58:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:57,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:57,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:58:57,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:57,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956688226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:57,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:57,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:57,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002434948] [2022-03-15 15:58:57,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:57,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:57,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:57,818 INFO L87 Difference]: Start difference. First operand 198 states and 503 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:58,163 INFO L93 Difference]: Finished difference Result 280 states and 646 transitions. [2022-03-15 15:58:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:58:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:58,164 INFO L225 Difference]: With dead ends: 280 [2022-03-15 15:58:58,164 INFO L226 Difference]: Without dead ends: 280 [2022-03-15 15:58:58,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:58,164 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:58,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 162 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 328 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-03-15 15:58:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-15 15:58:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 196. [2022-03-15 15:58:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.5692307692307694) internal successors, (501), 195 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 501 transitions. [2022-03-15 15:58:58,167 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 501 transitions. Word has length 17 [2022-03-15 15:58:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:58,167 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 501 transitions. [2022-03-15 15:58:58,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 501 transitions. [2022-03-15 15:58:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:58,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:58,167 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:58,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 15:58:58,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 15:58:58,384 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -314219162, now seen corresponding path program 120 times [2022-03-15 15:58:58,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:58,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100713898] [2022-03-15 15:58:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:58,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100713898] [2022-03-15 15:58:58,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100713898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:58,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516723188] [2022-03-15 15:58:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:58,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:58,473 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) [2022-03-15 15:58:58,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:58:58,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:58,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:58,730 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:58:58,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:58,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:58:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:58,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:58,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:58,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:58,865 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 14 treesize of output 18 [2022-03-15 15:58:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516723188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:58,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:58,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:58,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285010178] [2022-03-15 15:58:58,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:58,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:58,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:58,921 INFO L87 Difference]: Start difference. First operand 196 states and 501 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:59,083 INFO L93 Difference]: Finished difference Result 265 states and 630 transitions. [2022-03-15 15:58:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:58:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:58:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:59,084 INFO L225 Difference]: With dead ends: 265 [2022-03-15 15:58:59,084 INFO L226 Difference]: Without dead ends: 265 [2022-03-15 15:58:59,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:59,085 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:59,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 166 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 333 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-03-15 15:58:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-15 15:58:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 198. [2022-03-15 15:58:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.5888324873096447) internal successors, (510), 197 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 510 transitions. [2022-03-15 15:58:59,088 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 510 transitions. Word has length 17 [2022-03-15 15:58:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:59,088 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 510 transitions. [2022-03-15 15:58:59,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 510 transitions. [2022-03-15 15:58:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:58:59,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:59,089 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:59,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 15:58:59,305 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,SelfDestructingSolverStorable125 [2022-03-15 15:58:59,305 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1638411610, now seen corresponding path program 121 times [2022-03-15 15:58:59,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:59,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666260196] [2022-03-15 15:58:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:59,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666260196] [2022-03-15 15:58:59,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666260196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:59,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181619979] [2022-03-15 15:58:59,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:59,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:59,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:59,378 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) [2022-03-15 15:58:59,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:58:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:58:59,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:59,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:59,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:59,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:59,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 34 [2022-03-15 15:58:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:59,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:59,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:59,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:59,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:58:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181619979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:59,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:59,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:58:59,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939151480] [2022-03-15 15:58:59,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:59,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:59,835 INFO L87 Difference]: Start difference. First operand 198 states and 510 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:00,030 INFO L93 Difference]: Finished difference Result 285 states and 658 transitions. [2022-03-15 15:59:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:00,031 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:59:00,031 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 15:59:00,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:00,031 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:00,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 174 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 345 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:59:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 15:59:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 199. [2022-03-15 15:59:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.585858585858586) internal successors, (512), 198 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 512 transitions. [2022-03-15 15:59:00,034 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 512 transitions. Word has length 17 [2022-03-15 15:59:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 512 transitions. [2022-03-15 15:59:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 512 transitions. [2022-03-15 15:59:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:00,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:00,034 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:00,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 15:59:00,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:00,246 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash 625719078, now seen corresponding path program 122 times [2022-03-15 15:59:00,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:00,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981812977] [2022-03-15 15:59:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:00,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981812977] [2022-03-15 15:59:00,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981812977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:00,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875094960] [2022-03-15 15:59:00,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:00,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:00,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:00,330 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) [2022-03-15 15:59:00,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:59:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:00,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:00,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2022-03-15 15:59:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:00,566 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:59:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:00,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:00,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-03-15 15:59:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875094960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:00,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:00,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:00,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012624024] [2022-03-15 15:59:00,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:00,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:00,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:00,803 INFO L87 Difference]: Start difference. First operand 199 states and 512 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:01,148 INFO L93 Difference]: Finished difference Result 288 states and 659 transitions. [2022-03-15 15:59:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:59:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:01,149 INFO L225 Difference]: With dead ends: 288 [2022-03-15 15:59:01,150 INFO L226 Difference]: Without dead ends: 288 [2022-03-15 15:59:01,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:01,150 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:01,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 195 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-15 15:59:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 200. [2022-03-15 15:59:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.5879396984924625) internal successors, (515), 199 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 515 transitions. [2022-03-15 15:59:01,152 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 515 transitions. Word has length 17 [2022-03-15 15:59:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 515 transitions. [2022-03-15 15:59:01,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 515 transitions. [2022-03-15 15:59:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:01,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:01,153 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:01,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 15:59:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:01,362 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:01,362 INFO L85 PathProgramCache]: Analyzing trace with hash -530765404, now seen corresponding path program 123 times [2022-03-15 15:59:01,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:01,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979486544] [2022-03-15 15:59:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:01,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:01,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979486544] [2022-03-15 15:59:01,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979486544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:01,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869668440] [2022-03-15 15:59:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:01,445 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) [2022-03-15 15:59:01,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:59:01,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:01,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:01,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:01,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:59:01,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:01,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:01,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:01,798 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 16 treesize of output 20 [2022-03-15 15:59:01,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:01,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869668440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:01,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:01,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:01,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169380230] [2022-03-15 15:59:01,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:01,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:01,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:01,859 INFO L87 Difference]: Start difference. First operand 200 states and 515 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:02,168 INFO L93 Difference]: Finished difference Result 282 states and 658 transitions. [2022-03-15 15:59:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:02,169 INFO L225 Difference]: With dead ends: 282 [2022-03-15 15:59:02,169 INFO L226 Difference]: Without dead ends: 282 [2022-03-15 15:59:02,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:02,169 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:02,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 196 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-15 15:59:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 205. [2022-03-15 15:59:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5980392156862746) internal successors, (530), 204 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 530 transitions. [2022-03-15 15:59:02,172 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 530 transitions. Word has length 17 [2022-03-15 15:59:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:02,172 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 530 transitions. [2022-03-15 15:59:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 530 transitions. [2022-03-15 15:59:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:02,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:02,172 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:02,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:02,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:02,373 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 460277152, now seen corresponding path program 124 times [2022-03-15 15:59:02,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:02,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468135415] [2022-03-15 15:59:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:02,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468135415] [2022-03-15 15:59:02,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468135415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:02,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403304205] [2022-03-15 15:59:02,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:02,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:02,460 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) [2022-03-15 15:59:02,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:59:02,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:02,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:02,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:02,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 34 [2022-03-15 15:59:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:02,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:02,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:02,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:02,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403304205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:02,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:02,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:59:02,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160826744] [2022-03-15 15:59:02,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:02,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:59:02,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:59:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:02,908 INFO L87 Difference]: Start difference. First operand 205 states and 530 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:03,191 INFO L93 Difference]: Finished difference Result 276 states and 656 transitions. [2022-03-15 15:59:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:03,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:03,192 INFO L225 Difference]: With dead ends: 276 [2022-03-15 15:59:03,192 INFO L226 Difference]: Without dead ends: 270 [2022-03-15 15:59:03,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:03,192 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:03,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 113 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-15 15:59:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 211. [2022-03-15 15:59:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.619047619047619) internal successors, (550), 210 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 550 transitions. [2022-03-15 15:59:03,194 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 550 transitions. Word has length 17 [2022-03-15 15:59:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:03,195 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 550 transitions. [2022-03-15 15:59:03,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 550 transitions. [2022-03-15 15:59:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:03,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:03,195 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:03,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:03,395 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,SelfDestructingSolverStorable129 [2022-03-15 15:59:03,395 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -680381794, now seen corresponding path program 125 times [2022-03-15 15:59:03,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:03,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018499687] [2022-03-15 15:59:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:03,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018499687] [2022-03-15 15:59:03,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018499687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:03,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638479081] [2022-03-15 15:59:03,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:03,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:03,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:03,478 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) [2022-03-15 15:59:03,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:59:03,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:03,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:03,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 31 [2022-03-15 15:59:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:03,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:59:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:03,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:03,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:59:03,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:03,922 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 40 treesize of output 38 [2022-03-15 15:59:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638479081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:04,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:04,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:04,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287334166] [2022-03-15 15:59:04,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:04,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:04,019 INFO L87 Difference]: Start difference. First operand 211 states and 550 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:04,181 INFO L93 Difference]: Finished difference Result 257 states and 632 transitions. [2022-03-15 15:59:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:04,182 INFO L225 Difference]: With dead ends: 257 [2022-03-15 15:59:04,182 INFO L226 Difference]: Without dead ends: 257 [2022-03-15 15:59:04,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:04,182 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:04,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-15 15:59:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 211. [2022-03-15 15:59:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.619047619047619) internal successors, (550), 210 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 550 transitions. [2022-03-15 15:59:04,184 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 550 transitions. Word has length 17 [2022-03-15 15:59:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:04,185 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 550 transitions. [2022-03-15 15:59:04,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 550 transitions. [2022-03-15 15:59:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:04,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:04,185 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:04,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:04,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:04,387 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1274433148, now seen corresponding path program 126 times [2022-03-15 15:59:04,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:04,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467759747] [2022-03-15 15:59:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:04,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467759747] [2022-03-15 15:59:04,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467759747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:04,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045826720] [2022-03-15 15:59:04,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:04,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:04,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:04,463 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) [2022-03-15 15:59:04,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:59:04,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:04,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:04,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:59:04,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:04,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2022-03-15 15:59:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:04,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:04,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:59:04,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:04,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 38 [2022-03-15 15:59:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045826720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:04,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:04,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:59:04,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527592012] [2022-03-15 15:59:04,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:59:04,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:59:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:04,983 INFO L87 Difference]: Start difference. First operand 211 states and 550 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:05,220 INFO L93 Difference]: Finished difference Result 259 states and 631 transitions. [2022-03-15 15:59:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:05,221 INFO L225 Difference]: With dead ends: 259 [2022-03-15 15:59:05,221 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:59:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:05,221 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:05,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 140 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:59:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 211. [2022-03-15 15:59:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6142857142857143) internal successors, (549), 210 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 549 transitions. [2022-03-15 15:59:05,224 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 549 transitions. Word has length 17 [2022-03-15 15:59:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:05,224 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 549 transitions. [2022-03-15 15:59:05,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 549 transitions. [2022-03-15 15:59:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:05,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:05,225 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:05,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:05,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:05,439 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1359793316, now seen corresponding path program 127 times [2022-03-15 15:59:05,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:05,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484549545] [2022-03-15 15:59:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:05,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484549545] [2022-03-15 15:59:05,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484549545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:05,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690303104] [2022-03-15 15:59:05,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:05,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:05,513 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) [2022-03-15 15:59:05,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:59:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:05,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:05,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:05,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:05,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:05,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:05,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:05,949 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 16 treesize of output 20 [2022-03-15 15:59:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690303104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:05,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:05,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:05,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160273313] [2022-03-15 15:59:05,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:05,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:05,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:05,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:05,994 INFO L87 Difference]: Start difference. First operand 211 states and 549 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:06,370 INFO L93 Difference]: Finished difference Result 280 states and 662 transitions. [2022-03-15 15:59:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:06,371 INFO L225 Difference]: With dead ends: 280 [2022-03-15 15:59:06,371 INFO L226 Difference]: Without dead ends: 280 [2022-03-15 15:59:06,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:59:06,371 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 111 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-15 15:59:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 209. [2022-03-15 15:59:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.605769230769231) internal successors, (542), 208 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 542 transitions. [2022-03-15 15:59:06,373 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 542 transitions. Word has length 17 [2022-03-15 15:59:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 542 transitions. [2022-03-15 15:59:06,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 542 transitions. [2022-03-15 15:59:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:06,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:06,374 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:06,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 15:59:06,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,574 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1859462824, now seen corresponding path program 128 times [2022-03-15 15:59:06,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:06,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873326854] [2022-03-15 15:59:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:06,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:06,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873326854] [2022-03-15 15:59:06,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873326854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:06,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260684315] [2022-03-15 15:59:06,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:06,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:06,655 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) [2022-03-15 15:59:06,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 15:59:06,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:06,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:06,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:06,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:06,896 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:06,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:06,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:06,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:07,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:07,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:07,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:07,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260684315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:07,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:07,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:07,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382381469] [2022-03-15 15:59:07,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:07,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:07,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:07,088 INFO L87 Difference]: Start difference. First operand 209 states and 542 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:07,351 INFO L93 Difference]: Finished difference Result 246 states and 611 transitions. [2022-03-15 15:59:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:07,352 INFO L225 Difference]: With dead ends: 246 [2022-03-15 15:59:07,352 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 15:59:07,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:07,352 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:07,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 15:59:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 208. [2022-03-15 15:59:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.608695652173913) internal successors, (540), 207 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 540 transitions. [2022-03-15 15:59:07,354 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 540 transitions. Word has length 17 [2022-03-15 15:59:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:07,354 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 540 transitions. [2022-03-15 15:59:07,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 540 transitions. [2022-03-15 15:59:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:07,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:07,355 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:07,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 15:59:07,555 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1422811940, now seen corresponding path program 129 times [2022-03-15 15:59:07,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:07,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717494536] [2022-03-15 15:59:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:07,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717494536] [2022-03-15 15:59:07,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717494536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:07,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714590407] [2022-03-15 15:59:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:07,638 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) [2022-03-15 15:59:07,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 15:59:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:07,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:07,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:07,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:07,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:07,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:08,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,012 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 20 treesize of output 24 [2022-03-15 15:59:08,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714590407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:08,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:08,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:08,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210022303] [2022-03-15 15:59:08,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:08,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:08,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:08,061 INFO L87 Difference]: Start difference. First operand 208 states and 540 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:08,222 INFO L93 Difference]: Finished difference Result 242 states and 602 transitions. [2022-03-15 15:59:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:08,223 INFO L225 Difference]: With dead ends: 242 [2022-03-15 15:59:08,223 INFO L226 Difference]: Without dead ends: 242 [2022-03-15 15:59:08,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:08,223 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:08,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-15 15:59:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2022-03-15 15:59:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.6) internal successors, (533), 205 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 533 transitions. [2022-03-15 15:59:08,226 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 533 transitions. Word has length 17 [2022-03-15 15:59:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:08,226 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 533 transitions. [2022-03-15 15:59:08,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 533 transitions. [2022-03-15 15:59:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:08,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:08,226 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:08,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 15:59:08,426 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,SelfDestructingSolverStorable134 [2022-03-15 15:59:08,427 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1175334512, now seen corresponding path program 130 times [2022-03-15 15:59:08,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:08,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000509761] [2022-03-15 15:59:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:08,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000509761] [2022-03-15 15:59:08,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000509761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:08,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465471302] [2022-03-15 15:59:08,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:08,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:08,505 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) [2022-03-15 15:59:08,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 15:59:08,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:08,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:08,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:59:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:08,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:08,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,895 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 20 treesize of output 24 [2022-03-15 15:59:08,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465471302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:08,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:08,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:08,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144126423] [2022-03-15 15:59:08,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:08,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:08,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:08,942 INFO L87 Difference]: Start difference. First operand 206 states and 533 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:09,153 INFO L93 Difference]: Finished difference Result 249 states and 614 transitions. [2022-03-15 15:59:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:09,154 INFO L225 Difference]: With dead ends: 249 [2022-03-15 15:59:09,154 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:59:09,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:09,154 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:09,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:59:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 208. [2022-03-15 15:59:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.608695652173913) internal successors, (540), 207 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 540 transitions. [2022-03-15 15:59:09,166 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 540 transitions. Word has length 17 [2022-03-15 15:59:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:09,166 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 540 transitions. [2022-03-15 15:59:09,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 540 transitions. [2022-03-15 15:59:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:09,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:09,166 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:09,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:09,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 15:59:09,379 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2017128008, now seen corresponding path program 131 times [2022-03-15 15:59:09,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:09,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473702793] [2022-03-15 15:59:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:09,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473702793] [2022-03-15 15:59:09,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473702793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:09,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495459017] [2022-03-15 15:59:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:09,471 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) [2022-03-15 15:59:09,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 15:59:09,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:09,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:09,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 33 [2022-03-15 15:59:09,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:09,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:09,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:09,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:09,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:09,868 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 16 treesize of output 20 [2022-03-15 15:59:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495459017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:09,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:09,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:09,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436787618] [2022-03-15 15:59:09,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:09,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:09,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:09,911 INFO L87 Difference]: Start difference. First operand 208 states and 540 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:10,206 INFO L93 Difference]: Finished difference Result 261 states and 642 transitions. [2022-03-15 15:59:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:10,207 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:59:10,207 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 15:59:10,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:10,207 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:10,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 85 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 15:59:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 207. [2022-03-15 15:59:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.6019417475728157) internal successors, (536), 206 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 536 transitions. [2022-03-15 15:59:10,209 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 536 transitions. Word has length 17 [2022-03-15 15:59:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 536 transitions. [2022-03-15 15:59:10,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 536 transitions. [2022-03-15 15:59:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:10,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:10,220 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:10,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 15:59:10,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 15:59:10,431 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash -64497236, now seen corresponding path program 132 times [2022-03-15 15:59:10,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:10,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536846383] [2022-03-15 15:59:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:10,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:10,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536846383] [2022-03-15 15:59:10,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536846383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:10,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899746358] [2022-03-15 15:59:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:10,505 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) [2022-03-15 15:59:10,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 15:59:10,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:10,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 40 [2022-03-15 15:59:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:10,728 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:10,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:10,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:10,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:10,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899746358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:10,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:10,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:10,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540533461] [2022-03-15 15:59:10,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:10,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:10,973 INFO L87 Difference]: Start difference. First operand 207 states and 536 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:11,401 INFO L93 Difference]: Finished difference Result 295 states and 696 transitions. [2022-03-15 15:59:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:59:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:11,402 INFO L225 Difference]: With dead ends: 295 [2022-03-15 15:59:11,402 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 15:59:11,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:59:11,402 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:11,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 124 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 15:59:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 207. [2022-03-15 15:59:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.5970873786407767) internal successors, (535), 206 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 535 transitions. [2022-03-15 15:59:11,405 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 535 transitions. Word has length 17 [2022-03-15 15:59:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:11,405 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 535 transitions. [2022-03-15 15:59:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 535 transitions. [2022-03-15 15:59:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:11,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:11,405 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:11,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 15:59:11,614 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,SelfDestructingSolverStorable137 [2022-03-15 15:59:11,615 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1975677874, now seen corresponding path program 133 times [2022-03-15 15:59:11,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:11,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264169769] [2022-03-15 15:59:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:11,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264169769] [2022-03-15 15:59:11,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264169769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:11,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121963417] [2022-03-15 15:59:11,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:11,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:11,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:11,689 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) [2022-03-15 15:59:11,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 15:59:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:11,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:11,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:11,966 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:59:11,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:11,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:59:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:12,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:12,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:59:12,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:12,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 38 [2022-03-15 15:59:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121963417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:12,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:12,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:12,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552228296] [2022-03-15 15:59:12,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:12,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:12,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:12,221 INFO L87 Difference]: Start difference. First operand 207 states and 535 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:12,458 INFO L93 Difference]: Finished difference Result 266 states and 639 transitions. [2022-03-15 15:59:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:12,459 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:59:12,459 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 15:59:12,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:12,459 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:12,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 15:59:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 203. [2022-03-15 15:59:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.594059405940594) internal successors, (524), 202 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 524 transitions. [2022-03-15 15:59:12,461 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 524 transitions. Word has length 17 [2022-03-15 15:59:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:12,461 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 524 transitions. [2022-03-15 15:59:12,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 524 transitions. [2022-03-15 15:59:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:12,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:12,462 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:12,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-15 15:59:12,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:12,662 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2103292044, now seen corresponding path program 134 times [2022-03-15 15:59:12,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:12,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177648838] [2022-03-15 15:59:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:12,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177648838] [2022-03-15 15:59:12,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177648838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:12,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779279482] [2022-03-15 15:59:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:12,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:12,732 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:12,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 15:59:12,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:13,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 19 [2022-03-15 15:59:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:13,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:59:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:13,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:13,095 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 42 treesize of output 40 [2022-03-15 15:59:13,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:13,101 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 38 treesize of output 36 [2022-03-15 15:59:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779279482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:13,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:13,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:59:13,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707444102] [2022-03-15 15:59:13,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:13,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:59:13,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:59:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:59:13,192 INFO L87 Difference]: Start difference. First operand 203 states and 524 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:13,586 INFO L93 Difference]: Finished difference Result 294 states and 659 transitions. [2022-03-15 15:59:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:59:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:13,587 INFO L225 Difference]: With dead ends: 294 [2022-03-15 15:59:13,587 INFO L226 Difference]: Without dead ends: 281 [2022-03-15 15:59:13,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:59:13,587 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:13,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 178 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-15 15:59:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 202. [2022-03-15 15:59:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.6069651741293534) internal successors, (524), 201 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 524 transitions. [2022-03-15 15:59:13,590 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 524 transitions. Word has length 17 [2022-03-15 15:59:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:13,590 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 524 transitions. [2022-03-15 15:59:13,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 524 transitions. [2022-03-15 15:59:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:13,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:13,590 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:13,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 15:59:13,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 15:59:13,790 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -229939162, now seen corresponding path program 135 times [2022-03-15 15:59:13,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:13,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61418367] [2022-03-15 15:59:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:13,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61418367] [2022-03-15 15:59:13,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61418367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:13,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602601103] [2022-03-15 15:59:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:13,863 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:13,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 15:59:13,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:14,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:14,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:59:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:14,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 30 [2022-03-15 15:59:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:14,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:14,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:14,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:14,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:59:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602601103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:14,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:14,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:59:14,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608318357] [2022-03-15 15:59:14,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:14,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:59:14,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:59:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:14,367 INFO L87 Difference]: Start difference. First operand 202 states and 524 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:14,796 INFO L93 Difference]: Finished difference Result 285 states and 657 transitions. [2022-03-15 15:59:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:59:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:14,797 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:59:14,797 INFO L226 Difference]: Without dead ends: 279 [2022-03-15 15:59:14,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:59:14,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:14,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 180 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-15 15:59:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 205. [2022-03-15 15:59:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6176470588235294) internal successors, (534), 204 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 534 transitions. [2022-03-15 15:59:14,800 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 534 transitions. Word has length 17 [2022-03-15 15:59:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:14,800 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 534 transitions. [2022-03-15 15:59:14,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 534 transitions. [2022-03-15 15:59:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:14,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:14,801 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:14,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 15:59:15,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:15,001 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1964649462, now seen corresponding path program 136 times [2022-03-15 15:59:15,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:15,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53133461] [2022-03-15 15:59:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:15,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53133461] [2022-03-15 15:59:15,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53133461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:15,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331029514] [2022-03-15 15:59:15,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:15,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:15,073 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:15,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 15:59:15,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:15,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:15,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:15,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:15,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:15,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:15,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331029514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:15,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:15,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:59:15,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714025202] [2022-03-15 15:59:15,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:59:15,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:59:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:15,505 INFO L87 Difference]: Start difference. First operand 205 states and 534 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:15,836 INFO L93 Difference]: Finished difference Result 272 states and 672 transitions. [2022-03-15 15:59:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:15,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:15,837 INFO L225 Difference]: With dead ends: 272 [2022-03-15 15:59:15,837 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 15:59:15,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:15,837 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 15:59:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 212. [2022-03-15 15:59:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.6492890995260665) internal successors, (559), 211 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 559 transitions. [2022-03-15 15:59:15,840 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 559 transitions. Word has length 17 [2022-03-15 15:59:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:15,840 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 559 transitions. [2022-03-15 15:59:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 559 transitions. [2022-03-15 15:59:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:15,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:15,840 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:15,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 15:59:16,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:16,041 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1889080108, now seen corresponding path program 137 times [2022-03-15 15:59:16,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:16,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391564237] [2022-03-15 15:59:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:16,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391564237] [2022-03-15 15:59:16,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391564237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:16,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985350553] [2022-03-15 15:59:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:16,112 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 15:59:16,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:16,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:16,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:16,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2022-03-15 15:59:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:16,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 30 [2022-03-15 15:59:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:16,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:16,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:16,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:16,566 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 38 treesize of output 36 [2022-03-15 15:59:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985350553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:16,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:16,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:16,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19275199] [2022-03-15 15:59:16,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:16,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:16,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:16,666 INFO L87 Difference]: Start difference. First operand 212 states and 559 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:16,786 INFO L93 Difference]: Finished difference Result 268 states and 658 transitions. [2022-03-15 15:59:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:16,787 INFO L225 Difference]: With dead ends: 268 [2022-03-15 15:59:16,787 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 15:59:16,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:16,787 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:16,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 98 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 241 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-15 15:59:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 15:59:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 213. [2022-03-15 15:59:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.650943396226415) internal successors, (562), 212 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 562 transitions. [2022-03-15 15:59:16,790 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 562 transitions. Word has length 17 [2022-03-15 15:59:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 562 transitions. [2022-03-15 15:59:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 562 transitions. [2022-03-15 15:59:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:16,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:16,791 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:16,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 15:59:16,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:16,991 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash 782395500, now seen corresponding path program 138 times [2022-03-15 15:59:16,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:16,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786118309] [2022-03-15 15:59:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:16,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:17,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786118309] [2022-03-15 15:59:17,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786118309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:17,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519457097] [2022-03-15 15:59:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:17,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:17,057 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:17,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 15:59:17,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:17,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:17,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:59:17,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:17,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 17 [2022-03-15 15:59:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:17,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:17,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:17,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:17,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:59:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519457097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:17,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:17,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:59:17,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120159990] [2022-03-15 15:59:17,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:17,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:59:17,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:59:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:59:17,561 INFO L87 Difference]: Start difference. First operand 213 states and 562 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:17,657 INFO L93 Difference]: Finished difference Result 238 states and 598 transitions. [2022-03-15 15:59:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:17,658 INFO L225 Difference]: With dead ends: 238 [2022-03-15 15:59:17,658 INFO L226 Difference]: Without dead ends: 234 [2022-03-15 15:59:17,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:17,658 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:17,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 108 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 237 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-03-15 15:59:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-15 15:59:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2022-03-15 15:59:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6462264150943398) internal successors, (561), 212 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 561 transitions. [2022-03-15 15:59:17,660 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 561 transitions. Word has length 17 [2022-03-15 15:59:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:17,660 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 561 transitions. [2022-03-15 15:59:17,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 561 transitions. [2022-03-15 15:59:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:17,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:17,661 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:17,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-15 15:59:17,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:17,861 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash 709999078, now seen corresponding path program 139 times [2022-03-15 15:59:17,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:17,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137192480] [2022-03-15 15:59:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:17,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137192480] [2022-03-15 15:59:17,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137192480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:17,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338474787] [2022-03-15 15:59:17,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:17,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:17,933 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:17,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 15:59:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:18,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:18,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:18,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:18,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:18,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:18,323 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 16 treesize of output 20 [2022-03-15 15:59:18,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:18,327 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 14 treesize of output 18 [2022-03-15 15:59:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338474787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:18,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:18,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:18,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925835335] [2022-03-15 15:59:18,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:18,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:18,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:18,380 INFO L87 Difference]: Start difference. First operand 213 states and 561 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:18,520 INFO L93 Difference]: Finished difference Result 241 states and 621 transitions. [2022-03-15 15:59:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:18,521 INFO L225 Difference]: With dead ends: 241 [2022-03-15 15:59:18,521 INFO L226 Difference]: Without dead ends: 241 [2022-03-15 15:59:18,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:18,521 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:18,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-15 15:59:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-15 15:59:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 214. [2022-03-15 15:59:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.647887323943662) internal successors, (564), 213 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 564 transitions. [2022-03-15 15:59:18,524 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 564 transitions. Word has length 17 [2022-03-15 15:59:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:18,524 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 564 transitions. [2022-03-15 15:59:18,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 564 transitions. [2022-03-15 15:59:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:18,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:18,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:18,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-15 15:59:18,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 15:59:18,725 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 138544272, now seen corresponding path program 140 times [2022-03-15 15:59:18,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:18,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366034137] [2022-03-15 15:59:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:18,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366034137] [2022-03-15 15:59:18,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366034137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:18,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077182571] [2022-03-15 15:59:18,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:18,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:18,796 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 15:59:18,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:18,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:19,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:19,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:19,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:19,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:19,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:19,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:19,195 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 14 treesize of output 18 [2022-03-15 15:59:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077182571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:19,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:19,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:19,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830845746] [2022-03-15 15:59:19,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:19,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:19,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:19,248 INFO L87 Difference]: Start difference. First operand 214 states and 564 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:19,392 INFO L93 Difference]: Finished difference Result 244 states and 621 transitions. [2022-03-15 15:59:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:19,393 INFO L225 Difference]: With dead ends: 244 [2022-03-15 15:59:19,393 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 15:59:19,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:19,393 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:19,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-15 15:59:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 15:59:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2022-03-15 15:59:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6462264150943398) internal successors, (561), 212 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 561 transitions. [2022-03-15 15:59:19,396 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 561 transitions. Word has length 17 [2022-03-15 15:59:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:19,396 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 561 transitions. [2022-03-15 15:59:19,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 561 transitions. [2022-03-15 15:59:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:19,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:19,396 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:19,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:19,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 15:59:19,611 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -708852872, now seen corresponding path program 141 times [2022-03-15 15:59:19,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:19,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811529820] [2022-03-15 15:59:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:19,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811529820] [2022-03-15 15:59:19,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811529820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:19,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892305850] [2022-03-15 15:59:19,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:19,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:19,681 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:19,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 15:59:19,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:19,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:19,920 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:19,922 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:20,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:20,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:20,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:20,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892305850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:20,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:20,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:20,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282115991] [2022-03-15 15:59:20,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:20,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:20,100 INFO L87 Difference]: Start difference. First operand 213 states and 561 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:20,279 INFO L93 Difference]: Finished difference Result 282 states and 691 transitions. [2022-03-15 15:59:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:20,280 INFO L225 Difference]: With dead ends: 282 [2022-03-15 15:59:20,280 INFO L226 Difference]: Without dead ends: 282 [2022-03-15 15:59:20,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:20,280 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:20,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 131 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-15 15:59:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2022-03-15 15:59:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.662037037037037) internal successors, (575), 216 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 575 transitions. [2022-03-15 15:59:20,283 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 575 transitions. Word has length 17 [2022-03-15 15:59:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:20,283 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 575 transitions. [2022-03-15 15:59:20,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 575 transitions. [2022-03-15 15:59:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:20,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:20,284 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:20,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 15:59:20,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 15:59:20,484 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash 366858284, now seen corresponding path program 142 times [2022-03-15 15:59:20,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:20,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750042977] [2022-03-15 15:59:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:20,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750042977] [2022-03-15 15:59:20,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750042977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:20,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788368196] [2022-03-15 15:59:20,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:20,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:20,556 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:20,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 15:59:20,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:20,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:20,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:20,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:20,783 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:20,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 34 [2022-03-15 15:59:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:20,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:20,967 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 16 treesize of output 20 [2022-03-15 15:59:20,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:20,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788368196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:21,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:21,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:21,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66408837] [2022-03-15 15:59:21,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:21,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:21,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:21,024 INFO L87 Difference]: Start difference. First operand 217 states and 575 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:21,237 INFO L93 Difference]: Finished difference Result 309 states and 742 transitions. [2022-03-15 15:59:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:21,237 INFO L225 Difference]: With dead ends: 309 [2022-03-15 15:59:21,238 INFO L226 Difference]: Without dead ends: 309 [2022-03-15 15:59:21,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:21,238 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:21,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 165 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-15 15:59:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 216. [2022-03-15 15:59:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6651162790697676) internal successors, (573), 215 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 573 transitions. [2022-03-15 15:59:21,241 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 573 transitions. Word has length 17 [2022-03-15 15:59:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 573 transitions. [2022-03-15 15:59:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 573 transitions. [2022-03-15 15:59:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:21,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:21,241 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:21,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:21,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 15:59:21,457 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash -645834248, now seen corresponding path program 143 times [2022-03-15 15:59:21,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:21,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430419325] [2022-03-15 15:59:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:21,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430419325] [2022-03-15 15:59:21,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430419325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:21,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564587512] [2022-03-15 15:59:21,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:21,530 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:21,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 15:59:21,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:21,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:21,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 31 [2022-03-15 15:59:21,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:21,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:59:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:21,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:21,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:21,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:21,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:59:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564587512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:22,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:22,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:22,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899008901] [2022-03-15 15:59:22,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:22,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:22,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:22,052 INFO L87 Difference]: Start difference. First operand 216 states and 573 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:22,380 INFO L93 Difference]: Finished difference Result 301 states and 713 transitions. [2022-03-15 15:59:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:22,381 INFO L225 Difference]: With dead ends: 301 [2022-03-15 15:59:22,381 INFO L226 Difference]: Without dead ends: 301 [2022-03-15 15:59:22,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:22,381 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:22,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 185 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 354 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:59:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-15 15:59:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 216. [2022-03-15 15:59:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6651162790697676) internal successors, (573), 215 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 573 transitions. [2022-03-15 15:59:22,384 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 573 transitions. Word has length 17 [2022-03-15 15:59:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 573 transitions. [2022-03-15 15:59:22,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 573 transitions. [2022-03-15 15:59:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:22,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:22,385 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:22,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-15 15:59:22,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,585 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1824915278, now seen corresponding path program 144 times [2022-03-15 15:59:22,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:22,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959071277] [2022-03-15 15:59:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:22,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959071277] [2022-03-15 15:59:22,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959071277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:22,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687289976] [2022-03-15 15:59:22,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:22,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:22,658 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:22,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 15:59:22,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:22,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:22,914 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:22,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:22,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:23,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:23,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:23,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:23,042 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 14 treesize of output 18 [2022-03-15 15:59:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687289976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:23,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:23,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:23,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403280996] [2022-03-15 15:59:23,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:23,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:23,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:23,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:23,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:23,097 INFO L87 Difference]: Start difference. First operand 216 states and 573 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:23,273 INFO L93 Difference]: Finished difference Result 254 states and 653 transitions. [2022-03-15 15:59:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:23,274 INFO L225 Difference]: With dead ends: 254 [2022-03-15 15:59:23,274 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:59:23,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:23,274 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:23,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 116 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:59:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:59:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 219. [2022-03-15 15:59:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.6743119266055047) internal successors, (583), 218 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 583 transitions. [2022-03-15 15:59:23,277 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 583 transitions. Word has length 17 [2022-03-15 15:59:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:23,277 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 583 transitions. [2022-03-15 15:59:23,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 583 transitions. [2022-03-15 15:59:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:23,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:23,277 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:23,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 15:59:23,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 15:59:23,478 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1974531668, now seen corresponding path program 145 times [2022-03-15 15:59:23,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:23,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741815443] [2022-03-15 15:59:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:23,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741815443] [2022-03-15 15:59:23,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741815443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:23,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845964909] [2022-03-15 15:59:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:23,554 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:23,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 15:59:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:23,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:23,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:23,928 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 42 treesize of output 34 [2022-03-15 15:59:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:23,931 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-03-15 15:59:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:24,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:24,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:59:24,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:24,079 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 40 treesize of output 38 [2022-03-15 15:59:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845964909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:24,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:24,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:24,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564307431] [2022-03-15 15:59:24,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:24,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:24,175 INFO L87 Difference]: Start difference. First operand 219 states and 583 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:24,341 INFO L93 Difference]: Finished difference Result 298 states and 720 transitions. [2022-03-15 15:59:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:24,342 INFO L225 Difference]: With dead ends: 298 [2022-03-15 15:59:24,342 INFO L226 Difference]: Without dead ends: 298 [2022-03-15 15:59:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:24,342 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:24,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 174 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 243 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-03-15 15:59:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-15 15:59:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2022-03-15 15:59:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6666666666666665) internal successors, (592), 222 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 592 transitions. [2022-03-15 15:59:24,345 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 592 transitions. Word has length 17 [2022-03-15 15:59:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:24,345 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 592 transitions. [2022-03-15 15:59:24,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 592 transitions. [2022-03-15 15:59:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:24,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:24,345 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:24,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-15 15:59:24,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:24,558 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 65643442, now seen corresponding path program 146 times [2022-03-15 15:59:24,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:24,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198641666] [2022-03-15 15:59:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:24,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198641666] [2022-03-15 15:59:24,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198641666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:24,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503873284] [2022-03-15 15:59:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:24,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:24,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:24,659 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 15:59:24,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:24,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:24,923 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:24,925 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:25,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:25,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:25,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:25,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503873284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:25,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:25,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:25,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017718972] [2022-03-15 15:59:25,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:25,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:25,164 INFO L87 Difference]: Start difference. First operand 223 states and 592 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:25,465 INFO L93 Difference]: Finished difference Result 285 states and 696 transitions. [2022-03-15 15:59:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:59:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:25,465 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:59:25,465 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 15:59:25,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:25,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:25,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 190 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 271 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-03-15 15:59:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 15:59:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 223. [2022-03-15 15:59:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.644144144144144) internal successors, (587), 222 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) [2022-03-15 15:59:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 587 transitions. [2022-03-15 15:59:25,469 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 587 transitions. Word has length 17 [2022-03-15 15:59:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:25,469 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 587 transitions. [2022-03-15 15:59:25,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 587 transitions. [2022-03-15 15:59:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:25,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:25,469 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:25,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:25,670 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1163951146, now seen corresponding path program 147 times [2022-03-15 15:59:25,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:25,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684142330] [2022-03-15 15:59:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:25,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684142330] [2022-03-15 15:59:25,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684142330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:25,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46048393] [2022-03-15 15:59:25,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:25,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:25,754 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 15:59:25,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:25,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:26,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:26,028 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:26,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:26,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,174 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 20 treesize of output 24 [2022-03-15 15:59:26,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46048393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:26,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:26,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:26,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546610740] [2022-03-15 15:59:26,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:26,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:26,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:26,221 INFO L87 Difference]: Start difference. First operand 223 states and 587 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:26,462 INFO L93 Difference]: Finished difference Result 261 states and 661 transitions. [2022-03-15 15:59:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:26,462 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:59:26,462 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 15:59:26,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:26,463 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:26,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 240 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-15 15:59:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 15:59:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2022-03-15 15:59:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6470588235294117) internal successors, (585), 221 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 585 transitions. [2022-03-15 15:59:26,465 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 585 transitions. Word has length 17 [2022-03-15 15:59:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:26,465 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 585 transitions. [2022-03-15 15:59:26,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 585 transitions. [2022-03-15 15:59:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:26,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:26,466 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:26,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-15 15:59:26,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:26,667 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 151258614, now seen corresponding path program 148 times [2022-03-15 15:59:26,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:26,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329818992] [2022-03-15 15:59:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:26,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329818992] [2022-03-15 15:59:26,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329818992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:26,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009009786] [2022-03-15 15:59:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:26,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:26,763 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:26,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 15:59:26,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:27,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:27,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,029 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:27,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:27,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:27,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:27,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009009786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:27,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:27,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 15:59:27,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518319021] [2022-03-15 15:59:27,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:27,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:27,214 INFO L87 Difference]: Start difference. First operand 222 states and 585 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:27,349 INFO L93 Difference]: Finished difference Result 252 states and 644 transitions. [2022-03-15 15:59:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:27,350 INFO L225 Difference]: With dead ends: 252 [2022-03-15 15:59:27,350 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:59:27,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:27,350 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:27,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-03-15 15:59:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:59:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 223. [2022-03-15 15:59:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6531531531531534) internal successors, (589), 222 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 589 transitions. [2022-03-15 15:59:27,353 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 589 transitions. Word has length 17 [2022-03-15 15:59:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:27,353 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 589 transitions. [2022-03-15 15:59:27,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 589 transitions. [2022-03-15 15:59:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:27,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:27,353 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:27,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-15 15:59:27,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,554 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1676713862, now seen corresponding path program 149 times [2022-03-15 15:59:27,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:27,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084171431] [2022-03-15 15:59:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:27,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084171431] [2022-03-15 15:59:27,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084171431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:27,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183329800] [2022-03-15 15:59:27,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:27,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:27,625 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:27,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 15:59:27,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:27,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,850 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:27,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 12 [2022-03-15 15:59:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:27,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:27,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:27,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:27,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183329800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:28,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:28,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:59:28,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654376748] [2022-03-15 15:59:28,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:28,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:59:28,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:59:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:59:28,017 INFO L87 Difference]: Start difference. First operand 223 states and 589 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:28,208 INFO L93 Difference]: Finished difference Result 313 states and 759 transitions. [2022-03-15 15:59:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:28,208 INFO L225 Difference]: With dead ends: 313 [2022-03-15 15:59:28,208 INFO L226 Difference]: Without dead ends: 313 [2022-03-15 15:59:28,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:28,209 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:28,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-15 15:59:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 225. [2022-03-15 15:59:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6651785714285716) internal successors, (597), 224 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 597 transitions. [2022-03-15 15:59:28,212 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 597 transitions. Word has length 17 [2022-03-15 15:59:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:28,212 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 597 transitions. [2022-03-15 15:59:28,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 597 transitions. [2022-03-15 15:59:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:28,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:28,212 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:28,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-15 15:59:28,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-03-15 15:59:28,412 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1542542278, now seen corresponding path program 150 times [2022-03-15 15:59:28,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:28,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107220257] [2022-03-15 15:59:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:28,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107220257] [2022-03-15 15:59:28,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107220257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:28,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456435956] [2022-03-15 15:59:28,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:28,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:28,482 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:28,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 15:59:28,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:28,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:28,694 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:28,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:28,696 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:28,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:28,881 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 16 treesize of output 20 [2022-03-15 15:59:28,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:28,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456435956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:28,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:28,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:59:28,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866728928] [2022-03-15 15:59:28,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:59:28,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:59:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:59:28,928 INFO L87 Difference]: Start difference. First operand 225 states and 597 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:29,189 INFO L93 Difference]: Finished difference Result 332 states and 795 transitions. [2022-03-15 15:59:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:29,190 INFO L225 Difference]: With dead ends: 332 [2022-03-15 15:59:29,190 INFO L226 Difference]: Without dead ends: 332 [2022-03-15 15:59:29,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:29,190 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 120 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:29,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 209 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-15 15:59:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 223. [2022-03-15 15:59:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.671171171171171) internal successors, (593), 222 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 593 transitions. [2022-03-15 15:59:29,193 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 593 transitions. Word has length 17 [2022-03-15 15:59:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:29,193 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 593 transitions. [2022-03-15 15:59:29,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 593 transitions. [2022-03-15 15:59:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:29,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:29,193 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:29,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 15:59:29,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 15:59:29,394 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1739732486, now seen corresponding path program 151 times [2022-03-15 15:59:29,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:29,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597001623] [2022-03-15 15:59:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:29,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:29,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597001623] [2022-03-15 15:59:29,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597001623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:29,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040512385] [2022-03-15 15:59:29,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:29,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:29,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:29,461 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:29,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 15:59:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:29,766 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:59:29,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:29,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 30 [2022-03-15 15:59:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:29,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:29,896 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 42 treesize of output 40 [2022-03-15 15:59:29,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:29,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-03-15 15:59:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040512385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:29,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:29,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:59:29,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085276559] [2022-03-15 15:59:29,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:59:29,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:59:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:59:29,986 INFO L87 Difference]: Start difference. First operand 223 states and 593 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:30,283 INFO L93 Difference]: Finished difference Result 311 states and 749 transitions. [2022-03-15 15:59:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:59:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:30,284 INFO L225 Difference]: With dead ends: 311 [2022-03-15 15:59:30,284 INFO L226 Difference]: Without dead ends: 311 [2022-03-15 15:59:30,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:30,284 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:30,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 151 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 368 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-03-15 15:59:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-15 15:59:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 223. [2022-03-15 15:59:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.671171171171171) internal successors, (593), 222 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 593 transitions. [2022-03-15 15:59:30,287 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 593 transitions. Word has length 17 [2022-03-15 15:59:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 593 transitions. [2022-03-15 15:59:30,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 593 transitions. [2022-03-15 15:59:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:30,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:30,287 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:30,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 15:59:30,498 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 633047878, now seen corresponding path program 152 times [2022-03-15 15:59:30,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:30,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374629623] [2022-03-15 15:59:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:30,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374629623] [2022-03-15 15:59:30,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374629623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:30,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316284897] [2022-03-15 15:59:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:30,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:30,561 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:30,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 15:59:30,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:30,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:30,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:30,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 19 [2022-03-15 15:59:30,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:30,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 17 [2022-03-15 15:59:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:30,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:30,980 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 42 treesize of output 40 [2022-03-15 15:59:30,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:30,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:59:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316284897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:31,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:31,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:59:31,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328150189] [2022-03-15 15:59:31,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:31,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:59:31,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:59:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:59:31,075 INFO L87 Difference]: Start difference. First operand 223 states and 593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:31,211 INFO L93 Difference]: Finished difference Result 260 states and 650 transitions. [2022-03-15 15:59:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:31,212 INFO L225 Difference]: With dead ends: 260 [2022-03-15 15:59:31,212 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:59:31,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:31,212 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:31,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 108 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-03-15 15:59:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:59:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 223. [2022-03-15 15:59:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6621621621621623) internal successors, (591), 222 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 591 transitions. [2022-03-15 15:59:31,221 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 591 transitions. Word has length 17 [2022-03-15 15:59:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:31,221 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 591 transitions. [2022-03-15 15:59:31,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 591 transitions. [2022-03-15 15:59:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:31,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:31,221 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:31,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 15:59:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 15:59:31,435 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash 560651456, now seen corresponding path program 153 times [2022-03-15 15:59:31,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:31,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750472994] [2022-03-15 15:59:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:31,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750472994] [2022-03-15 15:59:31,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750472994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:31,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823988779] [2022-03-15 15:59:31,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:31,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:31,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:31,503 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:31,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 15:59:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:31,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:31,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:59:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:31,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 15:59:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:31,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:31,864 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 16 treesize of output 20 [2022-03-15 15:59:31,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:31,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:59:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823988779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:31,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:31,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:59:31,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643496609] [2022-03-15 15:59:31,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:31,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:59:31,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:59:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:59:31,910 INFO L87 Difference]: Start difference. First operand 223 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:32,096 INFO L93 Difference]: Finished difference Result 290 states and 717 transitions. [2022-03-15 15:59:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:32,097 INFO L225 Difference]: With dead ends: 290 [2022-03-15 15:59:32,097 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 15:59:32,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:32,097 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:32,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 128 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 317 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-03-15 15:59:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 15:59:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 220. [2022-03-15 15:59:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.671232876712329) internal successors, (585), 219 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 585 transitions. [2022-03-15 15:59:32,100 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 585 transitions. Word has length 17 [2022-03-15 15:59:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 585 transitions. [2022-03-15 15:59:32,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 585 transitions. [2022-03-15 15:59:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:32,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:32,100 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:32,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-15 15:59:32,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 15:59:32,305 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash 411035066, now seen corresponding path program 154 times [2022-03-15 15:59:32,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:32,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802934625] [2022-03-15 15:59:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:32,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:32,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802934625] [2022-03-15 15:59:32,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802934625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:32,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683127091] [2022-03-15 15:59:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:32,376 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:32,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 15:59:32,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:32,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:32,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:59:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:32,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2022-03-15 15:59:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:32,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:32,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 15:59:32,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:32,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 38 [2022-03-15 15:59:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683127091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:32,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:32,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:59:32,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76927842] [2022-03-15 15:59:32,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:32,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:59:32,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:59:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:59:32,942 INFO L87 Difference]: Start difference. First operand 220 states and 585 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:33,004 INFO L93 Difference]: Finished difference Result 244 states and 634 transitions. [2022-03-15 15:59:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:59:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:33,005 INFO L225 Difference]: With dead ends: 244 [2022-03-15 15:59:33,005 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 15:59:33,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:59:33,005 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:33,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:59:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 15:59:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 223. [2022-03-15 15:59:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6621621621621623) internal successors, (591), 222 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 591 transitions. [2022-03-15 15:59:33,008 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 591 transitions. Word has length 17 [2022-03-15 15:59:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 591 transitions. [2022-03-15 15:59:33,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 591 transitions. [2022-03-15 15:59:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:33,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:33,008 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:33,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 15:59:33,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:33,208 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1843757120, now seen corresponding path program 155 times [2022-03-15 15:59:33,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:33,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749809373] [2022-03-15 15:59:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:33,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749809373] [2022-03-15 15:59:33,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749809373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:33,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581144067] [2022-03-15 15:59:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:33,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:33,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:33,277 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:33,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 15:59:33,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:33,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:33,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:33,501 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 50 treesize of output 40 [2022-03-15 15:59:33,503 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 44 treesize of output 34 [2022-03-15 15:59:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:33,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:33,692 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 20 treesize of output 24 [2022-03-15 15:59:33,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:33,696 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 16 treesize of output 20 [2022-03-15 15:59:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581144067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:33,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:33,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:59:33,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604727157] [2022-03-15 15:59:33,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:33,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:59:33,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:59:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:59:33,728 INFO L87 Difference]: Start difference. First operand 223 states and 591 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:33,936 INFO L93 Difference]: Finished difference Result 277 states and 690 transitions. [2022-03-15 15:59:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:33,937 INFO L225 Difference]: With dead ends: 277 [2022-03-15 15:59:33,937 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 15:59:33,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:33,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:33,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 123 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 15:59:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 225. [2022-03-15 15:59:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.674107142857143) internal successors, (599), 224 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 599 transitions. [2022-03-15 15:59:33,940 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 599 transitions. Word has length 17 [2022-03-15 15:59:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:33,940 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 599 transitions. [2022-03-15 15:59:33,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 599 transitions. [2022-03-15 15:59:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:33,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:33,941 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:33,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-15 15:59:34,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:34,155 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash -745449416, now seen corresponding path program 156 times [2022-03-15 15:59:34,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:34,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401061697] [2022-03-15 15:59:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:34,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:34,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:34,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401061697] [2022-03-15 15:59:34,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401061697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:34,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102580242] [2022-03-15 15:59:34,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:34,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:34,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:34,222 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:34,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 15:59:34,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:34,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:34,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:34,573 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 20 treesize of output 24 [2022-03-15 15:59:34,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:34,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:34,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102580242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:34,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:34,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:59:34,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533234523] [2022-03-15 15:59:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:59:34,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:59:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:59:34,607 INFO L87 Difference]: Start difference. First operand 225 states and 599 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:34,740 INFO L93 Difference]: Finished difference Result 255 states and 656 transitions. [2022-03-15 15:59:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:59:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:34,741 INFO L225 Difference]: With dead ends: 255 [2022-03-15 15:59:34,741 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:59:34,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:34,741 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:34,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 75 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:59:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 224. [2022-03-15 15:59:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6771300448430493) internal successors, (597), 223 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 597 transitions. [2022-03-15 15:59:34,744 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 597 transitions. Word has length 17 [2022-03-15 15:59:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:34,744 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 597 transitions. [2022-03-15 15:59:34,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 597 transitions. [2022-03-15 15:59:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:34,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:34,744 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:34,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-15 15:59:34,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-15 15:59:34,945 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1758141948, now seen corresponding path program 157 times [2022-03-15 15:59:34,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:34,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916702026] [2022-03-15 15:59:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:35,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916702026] [2022-03-15 15:59:35,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916702026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:35,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900568825] [2022-03-15 15:59:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:35,010 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:35,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 15:59:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:35,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:35,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:59:35,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:35,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900568825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:35,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:35,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:59:35,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236028961] [2022-03-15 15:59:35,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:35,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:59:35,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:59:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:59:35,394 INFO L87 Difference]: Start difference. First operand 224 states and 597 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:35,544 INFO L93 Difference]: Finished difference Result 253 states and 650 transitions. [2022-03-15 15:59:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:59:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:35,544 INFO L225 Difference]: With dead ends: 253 [2022-03-15 15:59:35,544 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 15:59:35,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:35,545 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:35,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 82 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 15:59:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 220. [2022-03-15 15:59:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.671232876712329) internal successors, (585), 219 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 585 transitions. [2022-03-15 15:59:35,547 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 585 transitions. Word has length 17 [2022-03-15 15:59:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:35,547 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 585 transitions. [2022-03-15 15:59:35,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 585 transitions. [2022-03-15 15:59:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:35,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:35,548 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:35,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-15 15:59:35,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:35,755 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash 903630828, now seen corresponding path program 158 times [2022-03-15 15:59:35,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:35,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121910289] [2022-03-15 15:59:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:35,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121910289] [2022-03-15 15:59:35,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121910289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:35,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180532520] [2022-03-15 15:59:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:35,835 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:35,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 15:59:35,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:36,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:59:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:36,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:59:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:36,410 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:36,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-15 15:59:36,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-15 15:59:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180532520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:36,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:36,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 15:59:36,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169188658] [2022-03-15 15:59:36,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:36,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:59:36,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:59:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:36,474 INFO L87 Difference]: Start difference. First operand 220 states and 585 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:36,598 INFO L93 Difference]: Finished difference Result 254 states and 650 transitions. [2022-03-15 15:59:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:36,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:36,599 INFO L225 Difference]: With dead ends: 254 [2022-03-15 15:59:36,599 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:59:36,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:36,599 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 73 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:59:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:59:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 218. [2022-03-15 15:59:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.6589861751152073) internal successors, (577), 217 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 577 transitions. [2022-03-15 15:59:36,602 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 577 transitions. Word has length 17 [2022-03-15 15:59:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:36,602 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 577 transitions. [2022-03-15 15:59:36,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 577 transitions. [2022-03-15 15:59:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:36,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:36,602 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:36,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-15 15:59:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:36,803 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1351161358, now seen corresponding path program 159 times [2022-03-15 15:59:36,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:36,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936495080] [2022-03-15 15:59:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:36,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:36,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936495080] [2022-03-15 15:59:36,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936495080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:36,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890294583] [2022-03-15 15:59:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:36,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:36,876 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:36,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 15:59:37,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:37,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:37,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-03-15 15:59:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:37,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:37,286 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:37,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:59:37,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:59:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:37,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890294583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:37,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:37,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:59:37,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349137572] [2022-03-15 15:59:37,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:59:37,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:59:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:59:37,296 INFO L87 Difference]: Start difference. First operand 218 states and 577 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:37,530 INFO L93 Difference]: Finished difference Result 275 states and 679 transitions. [2022-03-15 15:59:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:59:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:37,530 INFO L225 Difference]: With dead ends: 275 [2022-03-15 15:59:37,530 INFO L226 Difference]: Without dead ends: 275 [2022-03-15 15:59:37,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:37,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:37,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 121 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-15 15:59:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 220. [2022-03-15 15:59:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.671232876712329) internal successors, (585), 219 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 585 transitions. [2022-03-15 15:59:37,533 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 585 transitions. Word has length 17 [2022-03-15 15:59:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:37,533 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 585 transitions. [2022-03-15 15:59:37,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 585 transitions. [2022-03-15 15:59:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:37,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:37,534 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:37,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-15 15:59:37,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:37,750 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -252853654, now seen corresponding path program 160 times [2022-03-15 15:59:37,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:37,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563876570] [2022-03-15 15:59:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:37,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:37,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563876570] [2022-03-15 15:59:37,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563876570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:37,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774916853] [2022-03-15 15:59:37,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:37,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:37,819 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:37,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 15:59:37,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:38,181 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:38,182 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 13 treesize of output 12 [2022-03-15 15:59:38,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:59:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774916853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:38,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:38,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:59:38,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937854437] [2022-03-15 15:59:38,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:59:38,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:59:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:59:38,192 INFO L87 Difference]: Start difference. First operand 220 states and 585 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:38,352 INFO L93 Difference]: Finished difference Result 251 states and 642 transitions. [2022-03-15 15:59:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:38,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:38,353 INFO L225 Difference]: With dead ends: 251 [2022-03-15 15:59:38,353 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 15:59:38,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:59:38,353 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:38,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 100 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 15:59:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 219. [2022-03-15 15:59:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.6743119266055047) internal successors, (583), 218 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 583 transitions. [2022-03-15 15:59:38,356 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 583 transitions. Word has length 17 [2022-03-15 15:59:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:38,356 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 583 transitions. [2022-03-15 15:59:38,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 583 transitions. [2022-03-15 15:59:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:38,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:38,357 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:38,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 15:59:38,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:38,557 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1265546186, now seen corresponding path program 161 times [2022-03-15 15:59:38,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:38,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952081765] [2022-03-15 15:59:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:38,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952081765] [2022-03-15 15:59:38,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952081765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:38,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962137860] [2022-03-15 15:59:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:38,629 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:38,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 15:59:38,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:39,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:39,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:59:39,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:59:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962137860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:39,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:39,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:59:39,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248190189] [2022-03-15 15:59:39,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:59:39,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:59:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:59:39,016 INFO L87 Difference]: Start difference. First operand 219 states and 583 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:39,162 INFO L93 Difference]: Finished difference Result 252 states and 646 transitions. [2022-03-15 15:59:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:39,163 INFO L225 Difference]: With dead ends: 252 [2022-03-15 15:59:39,163 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:59:39,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:59:39,163 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:39,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 75 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:59:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2022-03-15 15:59:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.6774193548387095) internal successors, (581), 217 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 581 transitions. [2022-03-15 15:59:39,166 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 581 transitions. Word has length 17 [2022-03-15 15:59:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:39,166 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 581 transitions. [2022-03-15 15:59:39,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 581 transitions. [2022-03-15 15:59:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:39,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:39,166 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:39,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-15 15:59:39,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 15:59:39,367 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1386905018, now seen corresponding path program 162 times [2022-03-15 15:59:39,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:39,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150606703] [2022-03-15 15:59:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:39,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150606703] [2022-03-15 15:59:39,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150606703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:39,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044412621] [2022-03-15 15:59:39,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:39,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:39,435 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:39,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 15:59:39,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:39,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:39,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:39,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-03-15 15:59:39,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 15:59:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:39,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:39,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-15 15:59:39,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-15 15:59:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044412621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:39,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:39,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:59:39,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745363875] [2022-03-15 15:59:39,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:59:39,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:59:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:59:39,878 INFO L87 Difference]: Start difference. First operand 218 states and 581 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:39,965 INFO L93 Difference]: Finished difference Result 246 states and 631 transitions. [2022-03-15 15:59:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:59:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:39,966 INFO L225 Difference]: With dead ends: 246 [2022-03-15 15:59:39,966 INFO L226 Difference]: Without dead ends: 238 [2022-03-15 15:59:39,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:59:39,966 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:39,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 80 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-03-15 15:59:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-15 15:59:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2022-03-15 15:59:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.683720930232558) internal successors, (577), 215 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 577 transitions. [2022-03-15 15:59:39,969 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 577 transitions. Word has length 17 [2022-03-15 15:59:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:39,969 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 577 transitions. [2022-03-15 15:59:39,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 577 transitions. [2022-03-15 15:59:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:59:39,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:39,969 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:39,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:40,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 15:59:40,186 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1111108668, now seen corresponding path program 163 times [2022-03-15 15:59:40,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:40,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442419132] [2022-03-15 15:59:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:40,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:40,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442419132] [2022-03-15 15:59:40,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442419132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:40,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208934994] [2022-03-15 15:59:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:40,246 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:40,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 15:59:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:59:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:40,587 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:40,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 15:59:40,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 15:59:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208934994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:40,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:40,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:59:40,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092306917] [2022-03-15 15:59:40,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:59:40,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:59:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:59:40,597 INFO L87 Difference]: Start difference. First operand 216 states and 577 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:40,755 INFO L93 Difference]: Finished difference Result 256 states and 650 transitions. [2022-03-15 15:59:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:59:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:40,756 INFO L225 Difference]: With dead ends: 256 [2022-03-15 15:59:40,756 INFO L226 Difference]: Without dead ends: 256 [2022-03-15 15:59:40,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:59:40,756 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:40,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-15 15:59:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 213. [2022-03-15 15:59:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6745283018867925) internal successors, (567), 212 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 567 transitions. [2022-03-15 15:59:40,759 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 567 transitions. Word has length 17 [2022-03-15 15:59:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:40,759 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 567 transitions. [2022-03-15 15:59:40,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 567 transitions. [2022-03-15 15:59:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:40,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:40,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:40,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:40,960 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1774298185, now seen corresponding path program 164 times [2022-03-15 15:59:40,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:40,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146747122] [2022-03-15 15:59:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:40,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:41,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146747122] [2022-03-15 15:59:41,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146747122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:41,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507530825] [2022-03-15 15:59:41,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:41,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:41,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:41,225 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:41,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 15:59:41,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:42,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:42,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 181 treesize of output 155 [2022-03-15 15:59:42,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:42,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 137 [2022-03-15 15:59:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:42,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:44,164 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:44,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 311 [2022-03-15 15:59:44,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 262 [2022-03-15 15:59:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507530825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:44,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:44,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:44,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478410763] [2022-03-15 15:59:44,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:44,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:44,327 INFO L87 Difference]: Start difference. First operand 213 states and 567 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:45,125 INFO L93 Difference]: Finished difference Result 297 states and 755 transitions. [2022-03-15 15:59:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:59:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:45,126 INFO L225 Difference]: With dead ends: 297 [2022-03-15 15:59:45,126 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 15:59:45,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:59:45,126 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:45,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 196 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 487 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-03-15 15:59:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 15:59:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 227. [2022-03-15 15:59:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.6371681415929205) internal successors, (596), 226 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 596 transitions. [2022-03-15 15:59:45,129 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 596 transitions. Word has length 18 [2022-03-15 15:59:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:45,129 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 596 transitions. [2022-03-15 15:59:45,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 596 transitions. [2022-03-15 15:59:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:45,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:45,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:45,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 15:59:45,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 15:59:45,330 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1946788075, now seen corresponding path program 165 times [2022-03-15 15:59:45,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:45,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398209706] [2022-03-15 15:59:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:45,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:45,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398209706] [2022-03-15 15:59:45,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398209706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:45,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637027718] [2022-03-15 15:59:45,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:45,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:45,564 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:45,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 15:59:45,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:45,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:46,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 169 [2022-03-15 15:59:46,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:46,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 15:59:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:48,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:48,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 282 [2022-03-15 15:59:48,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 245 [2022-03-15 15:59:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:48,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637027718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:48,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:48,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:48,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127836728] [2022-03-15 15:59:48,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:48,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:48,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:48,682 INFO L87 Difference]: Start difference. First operand 227 states and 596 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:49,250 INFO L93 Difference]: Finished difference Result 309 states and 769 transitions. [2022-03-15 15:59:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:59:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:49,251 INFO L225 Difference]: With dead ends: 309 [2022-03-15 15:59:49,251 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 15:59:49,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:59:49,251 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:49,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 209 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 416 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2022-03-15 15:59:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 15:59:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 238. [2022-03-15 15:59:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.611814345991561) internal successors, (619), 237 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 619 transitions. [2022-03-15 15:59:49,254 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 619 transitions. Word has length 18 [2022-03-15 15:59:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:49,254 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 619 transitions. [2022-03-15 15:59:49,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 619 transitions. [2022-03-15 15:59:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:49,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:49,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:49,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-15 15:59:49,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:49,455 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1946193429, now seen corresponding path program 166 times [2022-03-15 15:59:49,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:49,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883320320] [2022-03-15 15:59:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:49,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:49,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883320320] [2022-03-15 15:59:49,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883320320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:49,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731842212] [2022-03-15 15:59:49,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:49,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:49,711 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:49,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 15:59:49,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:49,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:49,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:50,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:50,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 205 treesize of output 175 [2022-03-15 15:59:50,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:50,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 157 [2022-03-15 15:59:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:50,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:52,642 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:52,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 276 [2022-03-15 15:59:52,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 235 [2022-03-15 15:59:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:52,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731842212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:52,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:52,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:52,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944076066] [2022-03-15 15:59:52,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:52,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:52,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:52,786 INFO L87 Difference]: Start difference. First operand 238 states and 619 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:53,491 INFO L93 Difference]: Finished difference Result 308 states and 771 transitions. [2022-03-15 15:59:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:59:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:53,492 INFO L225 Difference]: With dead ends: 308 [2022-03-15 15:59:53,492 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 15:59:53,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:59:53,492 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:53,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 201 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 392 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-15 15:59:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 15:59:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 234. [2022-03-15 15:59:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2022-03-15 15:59:53,495 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2022-03-15 15:59:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:53,495 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2022-03-15 15:59:53,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2022-03-15 15:59:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:53,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:53,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:53,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-15 15:59:53,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-15 15:59:53,696 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1927759403, now seen corresponding path program 167 times [2022-03-15 15:59:53,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:53,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496583052] [2022-03-15 15:59:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:53,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:53,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496583052] [2022-03-15 15:59:53,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496583052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:53,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926143072] [2022-03-15 15:59:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:53,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:53,948 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:53,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 15:59:54,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:55,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 318 treesize of output 272 [2022-03-15 15:59:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:55,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-03-15 15:59:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:57,133 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:57,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 286 [2022-03-15 15:59:57,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 245 [2022-03-15 15:59:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926143072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:57,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:57,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:57,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253836794] [2022-03-15 15:59:57,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:57,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:57,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:57,246 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) 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) [2022-03-15 15:59:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:58,194 INFO L93 Difference]: Finished difference Result 299 states and 754 transitions. [2022-03-15 15:59:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:59:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) 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 18 [2022-03-15 15:59:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:58,194 INFO L225 Difference]: With dead ends: 299 [2022-03-15 15:59:58,194 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 15:59:58,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:59:58,195 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:58,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 179 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 490 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-03-15 15:59:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 15:59:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 232. [2022-03-15 15:59:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.6233766233766236) internal successors, (606), 231 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 606 transitions. [2022-03-15 15:59:58,198 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 606 transitions. Word has length 18 [2022-03-15 15:59:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:58,198 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 606 transitions. [2022-03-15 15:59:58,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) 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) [2022-03-15 15:59:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 606 transitions. [2022-03-15 15:59:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:58,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:58,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:58,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-15 15:59:58,411 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1356304597, now seen corresponding path program 168 times [2022-03-15 15:59:58,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:58,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784833021] [2022-03-15 15:59:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:58,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784833021] [2022-03-15 15:59:58,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784833021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:58,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871632367] [2022-03-15 15:59:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:58,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:58,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:58,641 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 15:59:58,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:59,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:59,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 219 [2022-03-15 15:59:59,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:59,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 193 [2022-03-15 16:00:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:00,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:01,579 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:01,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 327 [2022-03-15 16:00:01,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 278 [2022-03-15 16:00:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:01,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871632367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:01,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:01,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:01,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196459678] [2022-03-15 16:00:01,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:01,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:01,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:01,734 INFO L87 Difference]: Start difference. First operand 232 states and 606 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:02,667 INFO L93 Difference]: Finished difference Result 298 states and 751 transitions. [2022-03-15 16:00:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:00:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:02,668 INFO L225 Difference]: With dead ends: 298 [2022-03-15 16:00:02,668 INFO L226 Difference]: Without dead ends: 289 [2022-03-15 16:00:02,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:00:02,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:02,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 136 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 440 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-03-15 16:00:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-15 16:00:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 230. [2022-03-15 16:00:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.62882096069869) internal successors, (602), 229 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 602 transitions. [2022-03-15 16:00:02,671 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 602 transitions. Word has length 18 [2022-03-15 16:00:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:02,671 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 602 transitions. [2022-03-15 16:00:02,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 602 transitions. [2022-03-15 16:00:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:02,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:02,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:02,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:02,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:02,891 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1358930373, now seen corresponding path program 169 times [2022-03-15 16:00:02,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:02,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371060017] [2022-03-15 16:00:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:03,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:03,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371060017] [2022-03-15 16:00:03,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371060017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:03,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426985174] [2022-03-15 16:00:03,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:03,140 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:03,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 16:00:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:04,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 258 treesize of output 218 [2022-03-15 16:00:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:04,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 196 [2022-03-15 16:00:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:04,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:06,341 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:06,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 254 [2022-03-15 16:00:06,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 221 [2022-03-15 16:00:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:06,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426985174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:06,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:06,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:06,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268601520] [2022-03-15 16:00:06,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:06,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:06,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:06,896 INFO L87 Difference]: Start difference. First operand 230 states and 602 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:07,571 INFO L93 Difference]: Finished difference Result 306 states and 755 transitions. [2022-03-15 16:00:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:00:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:07,571 INFO L225 Difference]: With dead ends: 306 [2022-03-15 16:00:07,571 INFO L226 Difference]: Without dead ends: 294 [2022-03-15 16:00:07,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:00:07,581 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:07,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 192 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 465 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 16:00:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-15 16:00:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 226. [2022-03-15 16:00:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.631111111111111) internal successors, (592), 225 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 592 transitions. [2022-03-15 16:00:07,584 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 592 transitions. Word has length 18 [2022-03-15 16:00:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:07,584 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 592 transitions. [2022-03-15 16:00:07,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 592 transitions. [2022-03-15 16:00:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:07,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:07,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:07,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-15 16:00:07,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:07,785 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1576360013, now seen corresponding path program 170 times [2022-03-15 16:00:07,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:07,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845717229] [2022-03-15 16:00:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:08,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:08,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845717229] [2022-03-15 16:00:08,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845717229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:08,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811744164] [2022-03-15 16:00:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:08,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:08,031 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:08,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 16:00:08,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:08,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:09,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:09,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 155 [2022-03-15 16:00:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:09,081 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 137 [2022-03-15 16:00:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:09,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:10,864 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:10,865 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 348 treesize of output 313 [2022-03-15 16:00:10,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 262 [2022-03-15 16:00:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:11,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811744164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:11,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:11,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:11,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234385946] [2022-03-15 16:00:11,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:11,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:11,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:11,024 INFO L87 Difference]: Start difference. First operand 226 states and 592 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:11,849 INFO L93 Difference]: Finished difference Result 319 states and 772 transitions. [2022-03-15 16:00:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:00:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:11,849 INFO L225 Difference]: With dead ends: 319 [2022-03-15 16:00:11,849 INFO L226 Difference]: Without dead ends: 310 [2022-03-15 16:00:11,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:00:11,850 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:11,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 292 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 659 Invalid, 0 Unknown, 318 Unchecked, 0.3s Time] [2022-03-15 16:00:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-15 16:00:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 225. [2022-03-15 16:00:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.625) internal successors, (588), 224 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) [2022-03-15 16:00:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 588 transitions. [2022-03-15 16:00:11,853 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 588 transitions. Word has length 18 [2022-03-15 16:00:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 588 transitions. [2022-03-15 16:00:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 588 transitions. [2022-03-15 16:00:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:11,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:11,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:11,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 16:00:12,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:12,054 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1729821231, now seen corresponding path program 171 times [2022-03-15 16:00:12,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:12,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073671725] [2022-03-15 16:00:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:12,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:12,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:12,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073671725] [2022-03-15 16:00:12,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073671725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:12,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888148441] [2022-03-15 16:00:12,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:12,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:12,368 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:12,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 16:00:12,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:12,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:13,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:13,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 187 [2022-03-15 16:00:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:13,527 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 163 [2022-03-15 16:00:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:15,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:15,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 279 [2022-03-15 16:00:15,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 236 [2022-03-15 16:00:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:15,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888148441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:15,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:15,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:15,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126169095] [2022-03-15 16:00:15,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:15,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:15,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:15,601 INFO L87 Difference]: Start difference. First operand 225 states and 588 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:16,448 INFO L93 Difference]: Finished difference Result 305 states and 755 transitions. [2022-03-15 16:00:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:00:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:16,448 INFO L225 Difference]: With dead ends: 305 [2022-03-15 16:00:16,448 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 16:00:16,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:00:16,449 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:16,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 220 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 620 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-03-15 16:00:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 16:00:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 225. [2022-03-15 16:00:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6205357142857144) internal successors, (587), 224 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) [2022-03-15 16:00:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 587 transitions. [2022-03-15 16:00:16,452 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 587 transitions. Word has length 18 [2022-03-15 16:00:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:16,452 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 587 transitions. [2022-03-15 16:00:16,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 587 transitions. [2022-03-15 16:00:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:16,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:16,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:16,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-15 16:00:16,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-15 16:00:16,653 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1784653321, now seen corresponding path program 172 times [2022-03-15 16:00:16,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:16,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723947308] [2022-03-15 16:00:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:16,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:16,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723947308] [2022-03-15 16:00:16,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723947308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:16,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699848726] [2022-03-15 16:00:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:16,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:16,929 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:16,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 16:00:17,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:18,215 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 179 [2022-03-15 16:00:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:18,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-15 16:00:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:18,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:20,547 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:20,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 326 [2022-03-15 16:00:20,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 327 treesize of output 283 [2022-03-15 16:00:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:20,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699848726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:20,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:20,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:20,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069090052] [2022-03-15 16:00:20,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:20,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:20,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:20,737 INFO L87 Difference]: Start difference. First operand 225 states and 587 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:21,647 INFO L93 Difference]: Finished difference Result 306 states and 754 transitions. [2022-03-15 16:00:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:00:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:21,648 INFO L225 Difference]: With dead ends: 306 [2022-03-15 16:00:21,648 INFO L226 Difference]: Without dead ends: 296 [2022-03-15 16:00:21,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:00:21,648 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:21,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 304 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 647 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-03-15 16:00:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-15 16:00:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 232. [2022-03-15 16:00:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5974025974025974) internal successors, (600), 231 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 600 transitions. [2022-03-15 16:00:21,651 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 600 transitions. Word has length 18 [2022-03-15 16:00:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:21,651 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 600 transitions. [2022-03-15 16:00:21,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 600 transitions. [2022-03-15 16:00:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:21,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:21,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:21,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 16:00:21,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:21,868 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1956548565, now seen corresponding path program 173 times [2022-03-15 16:00:21,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:21,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695088878] [2022-03-15 16:00:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:21,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:22,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:22,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695088878] [2022-03-15 16:00:22,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695088878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:22,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629661370] [2022-03-15 16:00:22,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:22,116 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:22,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 16:00:22,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:00:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:23,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 205 treesize of output 177 [2022-03-15 16:00:23,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:23,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 181 treesize of output 157 [2022-03-15 16:00:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:23,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:25,310 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:25,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 213 [2022-03-15 16:00:25,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 186 [2022-03-15 16:00:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:25,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629661370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:25,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:25,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 16:00:25,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274231320] [2022-03-15 16:00:25,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:00:25,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:00:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:25,495 INFO L87 Difference]: Start difference. First operand 232 states and 600 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:26,594 INFO L93 Difference]: Finished difference Result 423 states and 989 transitions. [2022-03-15 16:00:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:00:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:26,595 INFO L225 Difference]: With dead ends: 423 [2022-03-15 16:00:26,595 INFO L226 Difference]: Without dead ends: 406 [2022-03-15 16:00:26,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:00:26,596 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:26,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 384 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 976 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2022-03-15 16:00:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-15 16:00:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 235. [2022-03-15 16:00:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.611111111111111) internal successors, (611), 234 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 611 transitions. [2022-03-15 16:00:26,599 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 611 transitions. Word has length 18 [2022-03-15 16:00:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:26,600 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 611 transitions. [2022-03-15 16:00:26,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 611 transitions. [2022-03-15 16:00:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:26,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:26,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:26,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-15 16:00:26,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:26,817 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1366659733, now seen corresponding path program 174 times [2022-03-15 16:00:26,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:26,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070127919] [2022-03-15 16:00:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:27,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:27,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070127919] [2022-03-15 16:00:27,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070127919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:27,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902698210] [2022-03-15 16:00:27,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:27,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:27,054 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:27,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 16:00:27,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:00:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:28,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 246 treesize of output 212 [2022-03-15 16:00:28,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:28,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 192 [2022-03-15 16:00:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:30,470 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:30,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 273 [2022-03-15 16:00:30,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 236 [2022-03-15 16:00:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:30,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902698210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:30,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:30,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:30,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130968244] [2022-03-15 16:00:30,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:30,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:30,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:30,620 INFO L87 Difference]: Start difference. First operand 235 states and 611 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:31,315 INFO L93 Difference]: Finished difference Result 306 states and 756 transitions. [2022-03-15 16:00:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:00:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:31,316 INFO L225 Difference]: With dead ends: 306 [2022-03-15 16:00:31,316 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 16:00:31,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:00:31,316 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:31,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 192 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 491 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-03-15 16:00:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 16:00:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 233. [2022-03-15 16:00:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.6206896551724137) internal successors, (608), 232 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 608 transitions. [2022-03-15 16:00:31,319 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 608 transitions. Word has length 18 [2022-03-15 16:00:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:31,319 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 608 transitions. [2022-03-15 16:00:31,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 608 transitions. [2022-03-15 16:00:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:31,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:31,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:31,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-15 16:00:31,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-15 16:00:31,520 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1363706867, now seen corresponding path program 175 times [2022-03-15 16:00:31,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:31,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195918206] [2022-03-15 16:00:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:31,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:31,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195918206] [2022-03-15 16:00:31,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195918206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:31,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026793580] [2022-03-15 16:00:31,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:31,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:31,791 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:31,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 16:00:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:00:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:33,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:33,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 208 [2022-03-15 16:00:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:33,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 173 [2022-03-15 16:00:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:33,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:35,415 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:35,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 261 [2022-03-15 16:00:35,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 226 [2022-03-15 16:00:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:35,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026793580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:35,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:35,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:35,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763773068] [2022-03-15 16:00:35,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:35,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:35,662 INFO L87 Difference]: Start difference. First operand 233 states and 608 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:36,329 INFO L93 Difference]: Finished difference Result 309 states and 761 transitions. [2022-03-15 16:00:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:00:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:36,330 INFO L225 Difference]: With dead ends: 309 [2022-03-15 16:00:36,330 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 16:00:36,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:36,331 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:36,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 201 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 456 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2022-03-15 16:00:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 16:00:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 234. [2022-03-15 16:00:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6223175965665235) internal successors, (611), 233 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 611 transitions. [2022-03-15 16:00:36,333 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 611 transitions. Word has length 18 [2022-03-15 16:00:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:36,334 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 611 transitions. [2022-03-15 16:00:36,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 611 transitions. [2022-03-15 16:00:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:36,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:36,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:36,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-15 16:00:36,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:36,535 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 751490441, now seen corresponding path program 176 times [2022-03-15 16:00:36,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:36,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544589054] [2022-03-15 16:00:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:36,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:36,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544589054] [2022-03-15 16:00:36,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544589054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:36,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469092776] [2022-03-15 16:00:36,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:36,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:36,822 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:36,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 16:00:36,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:38,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 152 [2022-03-15 16:00:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:38,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 134 [2022-03-15 16:00:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:38,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:40,307 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:40,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 337 treesize of output 288 [2022-03-15 16:00:40,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 253 [2022-03-15 16:00:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469092776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:40,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:40,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:40,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976079589] [2022-03-15 16:00:40,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:40,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:40,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:40,461 INFO L87 Difference]: Start difference. First operand 234 states and 611 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:42,068 INFO L93 Difference]: Finished difference Result 318 states and 781 transitions. [2022-03-15 16:00:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:00:42,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:42,069 INFO L225 Difference]: With dead ends: 318 [2022-03-15 16:00:42,069 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 16:00:42,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:00:42,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:42,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 279 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 701 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-03-15 16:00:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 16:00:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 235. [2022-03-15 16:00:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6196581196581197) internal successors, (613), 234 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 613 transitions. [2022-03-15 16:00:42,073 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 613 transitions. Word has length 18 [2022-03-15 16:00:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:42,073 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 613 transitions. [2022-03-15 16:00:42,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 613 transitions. [2022-03-15 16:00:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:42,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:42,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:42,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-15 16:00:42,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:42,287 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1651006605, now seen corresponding path program 177 times [2022-03-15 16:00:42,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:42,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849885308] [2022-03-15 16:00:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:42,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:42,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849885308] [2022-03-15 16:00:42,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849885308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:42,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432451557] [2022-03-15 16:00:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:42,565 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:42,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 16:00:42,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:43,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 178 [2022-03-15 16:00:43,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:43,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 156 [2022-03-15 16:00:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:44,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:45,886 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:45,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 342 [2022-03-15 16:00:45,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 343 treesize of output 289 [2022-03-15 16:00:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:46,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432451557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:46,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:46,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:46,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568893536] [2022-03-15 16:00:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:46,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:46,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:46,049 INFO L87 Difference]: Start difference. First operand 235 states and 613 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:49,040 INFO L93 Difference]: Finished difference Result 451 states and 1003 transitions. [2022-03-15 16:00:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:00:49,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:49,041 INFO L225 Difference]: With dead ends: 451 [2022-03-15 16:00:49,041 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 16:00:49,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:00:49,041 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 209 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:49,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 327 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 830 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-03-15 16:00:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 16:00:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 239. [2022-03-15 16:00:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2022-03-15 16:00:49,045 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 18 [2022-03-15 16:00:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:49,045 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2022-03-15 16:00:49,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 16:00:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2022-03-15 16:00:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:49,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:49,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:49,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:49,260 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1604360037, now seen corresponding path program 178 times [2022-03-15 16:00:49,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:49,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350527742] [2022-03-15 16:00:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:49,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:49,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350527742] [2022-03-15 16:00:49,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350527742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:49,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309862912] [2022-03-15 16:00:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:49,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:49,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:49,525 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:49,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 16:00:49,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:50,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:50,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 259 [2022-03-15 16:00:50,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:50,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 221 [2022-03-15 16:00:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:50,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:53,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 502 treesize of output 442 [2022-03-15 16:00:53,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,198 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 436 treesize of output 362 [2022-03-15 16:00:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:53,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309862912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:53,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:53,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:00:53,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175805758] [2022-03-15 16:00:53,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:53,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:00:53,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:53,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:00:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:00:53,779 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:54,412 INFO L93 Difference]: Finished difference Result 308 states and 760 transitions. [2022-03-15 16:00:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:00:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:54,413 INFO L225 Difference]: With dead ends: 308 [2022-03-15 16:00:54,413 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 16:00:54,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:54,414 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:54,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 273 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 568 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2022-03-15 16:00:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 16:00:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 246. [2022-03-15 16:00:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6081632653061226) internal successors, (639), 245 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 639 transitions. [2022-03-15 16:00:54,417 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 639 transitions. Word has length 18 [2022-03-15 16:00:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:54,417 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 639 transitions. [2022-03-15 16:00:54,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 639 transitions. [2022-03-15 16:00:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:54,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:54,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:54,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-15 16:00:54,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:54,618 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1432464793, now seen corresponding path program 179 times [2022-03-15 16:00:54,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:54,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157679275] [2022-03-15 16:00:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:54,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:54,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:54,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157679275] [2022-03-15 16:00:54,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157679275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:54,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624911895] [2022-03-15 16:00:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:54,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:54,848 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:54,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 16:00:55,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:55,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:55,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:55,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-15 16:00:55,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:55,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 157 treesize of output 135 [2022-03-15 16:00:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:56,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:57,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:57,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 497 treesize of output 443 [2022-03-15 16:00:57,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:57,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 437 treesize of output 385 [2022-03-15 16:00:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:58,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624911895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:58,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:58,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:00:58,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554711261] [2022-03-15 16:00:58,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:58,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:00:58,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:00:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:00:58,495 INFO L87 Difference]: Start difference. First operand 246 states and 639 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:59,222 INFO L93 Difference]: Finished difference Result 300 states and 745 transitions. [2022-03-15 16:00:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:00:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:59,223 INFO L225 Difference]: With dead ends: 300 [2022-03-15 16:00:59,223 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 16:00:59,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:59,223 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:59,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 244 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 758 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-03-15 16:00:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 16:00:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 240. [2022-03-15 16:00:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6359832635983262) internal successors, (630), 239 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 630 transitions. [2022-03-15 16:00:59,226 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 630 transitions. Word has length 18 [2022-03-15 16:00:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 630 transitions. [2022-03-15 16:00:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 630 transitions. [2022-03-15 16:00:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:59,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:59,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:59,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-15 16:00:59,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:59,439 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1450898819, now seen corresponding path program 180 times [2022-03-15 16:00:59,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:59,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030730065] [2022-03-15 16:00:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:59,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:59,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030730065] [2022-03-15 16:00:59,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030730065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:59,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627707090] [2022-03-15 16:00:59,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:59,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:59,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:59,673 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:59,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 16:00:59,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:00:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:00,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:00,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 214 [2022-03-15 16:01:00,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:00,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 218 treesize of output 192 [2022-03-15 16:01:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:00,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:02,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:02,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 455 treesize of output 401 [2022-03-15 16:01:02,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:02,956 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 395 treesize of output 329 [2022-03-15 16:01:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:03,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627707090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:03,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:03,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:03,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611929692] [2022-03-15 16:01:03,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:03,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:03,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:03,942 INFO L87 Difference]: Start difference. First operand 240 states and 630 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:04,588 INFO L93 Difference]: Finished difference Result 299 states and 742 transitions. [2022-03-15 16:01:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:04,588 INFO L225 Difference]: With dead ends: 299 [2022-03-15 16:01:04,588 INFO L226 Difference]: Without dead ends: 289 [2022-03-15 16:01:04,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:01:04,589 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:04,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 189 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 606 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-03-15 16:01:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-15 16:01:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 240. [2022-03-15 16:01:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6317991631799162) internal successors, (629), 239 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 629 transitions. [2022-03-15 16:01:04,592 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 629 transitions. Word has length 18 [2022-03-15 16:01:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:04,592 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 629 transitions. [2022-03-15 16:01:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 629 transitions. [2022-03-15 16:01:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:04,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:04,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:04,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-15 16:01:04,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:04,793 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash -457752929, now seen corresponding path program 181 times [2022-03-15 16:01:04,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:04,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76071704] [2022-03-15 16:01:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:04,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:05,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76071704] [2022-03-15 16:01:05,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76071704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:05,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085719188] [2022-03-15 16:01:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:05,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:05,022 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:05,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 16:01:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:01:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:06,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 275 [2022-03-15 16:01:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:06,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 242 [2022-03-15 16:01:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:06,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:08,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:08,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 449 treesize of output 399 [2022-03-15 16:01:08,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:08,447 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 393 treesize of output 351 [2022-03-15 16:01:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:09,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085719188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:09,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:09,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:09,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337560201] [2022-03-15 16:01:09,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:09,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:09,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:09,510 INFO L87 Difference]: Start difference. First operand 240 states and 629 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:09,871 INFO L93 Difference]: Finished difference Result 297 states and 740 transitions. [2022-03-15 16:01:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:01:09,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:09,872 INFO L225 Difference]: With dead ends: 297 [2022-03-15 16:01:09,872 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 16:01:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:01:09,872 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:09,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 179 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-15 16:01:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 16:01:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-03-15 16:01:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.628099173553719) internal successors, (636), 242 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 636 transitions. [2022-03-15 16:01:09,875 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 636 transitions. Word has length 18 [2022-03-15 16:01:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:09,875 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 636 transitions. [2022-03-15 16:01:09,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 636 transitions. [2022-03-15 16:01:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:09,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:09,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:09,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-15 16:01:10,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-03-15 16:01:10,076 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -285857685, now seen corresponding path program 182 times [2022-03-15 16:01:10,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:10,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343767212] [2022-03-15 16:01:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:10,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:10,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343767212] [2022-03-15 16:01:10,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343767212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:10,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295874892] [2022-03-15 16:01:10,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:10,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:10,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:10,313 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:10,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 16:01:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:11,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 217 treesize of output 183 [2022-03-15 16:01:11,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:11,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 187 treesize of output 163 [2022-03-15 16:01:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:11,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:13,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:13,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 497 treesize of output 443 [2022-03-15 16:01:13,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:13,868 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 437 treesize of output 371 [2022-03-15 16:01:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:14,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295874892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:14,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:14,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:14,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545567625] [2022-03-15 16:01:14,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:14,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:14,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:14,555 INFO L87 Difference]: Start difference. First operand 243 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:15,725 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2022-03-15 16:01:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:15,726 INFO L225 Difference]: With dead ends: 305 [2022-03-15 16:01:15,726 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 16:01:15,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:15,726 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:15,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 260 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 657 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-03-15 16:01:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 16:01:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 241. [2022-03-15 16:01:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-03-15 16:01:15,729 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 18 [2022-03-15 16:01:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-03-15 16:01:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-03-15 16:01:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:15,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:15,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:15,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-15 16:01:15,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:15,930 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -304291711, now seen corresponding path program 183 times [2022-03-15 16:01:15,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:15,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766348817] [2022-03-15 16:01:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:16,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:16,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766348817] [2022-03-15 16:01:16,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766348817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:16,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906223881] [2022-03-15 16:01:16,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:16,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:16,189 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:16,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 16:01:16,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:17,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:17,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 209 treesize of output 179 [2022-03-15 16:01:17,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:17,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-15 16:01:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:17,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:19,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:19,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 428 treesize of output 378 [2022-03-15 16:01:19,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:19,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 334 [2022-03-15 16:01:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:19,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906223881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:19,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:19,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:19,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051645910] [2022-03-15 16:01:19,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:19,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:19,813 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:20,898 INFO L93 Difference]: Finished difference Result 301 states and 746 transitions. [2022-03-15 16:01:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:20,899 INFO L225 Difference]: With dead ends: 301 [2022-03-15 16:01:20,899 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 16:01:20,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:01:20,900 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:20,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 203 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 643 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-03-15 16:01:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 16:01:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2022-03-15 16:01:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.629166666666667) internal successors, (631), 240 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 631 transitions. [2022-03-15 16:01:20,902 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 631 transitions. Word has length 18 [2022-03-15 16:01:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 631 transitions. [2022-03-15 16:01:20,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 631 transitions. [2022-03-15 16:01:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:20,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:20,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:20,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-15 16:01:21,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-15 16:01:21,104 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1657444379, now seen corresponding path program 184 times [2022-03-15 16:01:21,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:21,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036549618] [2022-03-15 16:01:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:21,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:21,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036549618] [2022-03-15 16:01:21,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036549618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:21,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940676568] [2022-03-15 16:01:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:21,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:21,454 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 16:01:21,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:21,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:22,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:22,626 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 313 treesize of output 275 [2022-03-15 16:01:22,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:22,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 279 treesize of output 229 [2022-03-15 16:01:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:23,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:25,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:25,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 457 treesize of output 393 [2022-03-15 16:01:25,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:25,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 387 treesize of output 333 [2022-03-15 16:01:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:25,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940676568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:25,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:25,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:25,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750681491] [2022-03-15 16:01:25,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:25,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:25,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:25,882 INFO L87 Difference]: Start difference. First operand 241 states and 631 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:27,417 INFO L93 Difference]: Finished difference Result 309 states and 763 transitions. [2022-03-15 16:01:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:01:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:27,418 INFO L225 Difference]: With dead ends: 309 [2022-03-15 16:01:27,418 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 16:01:27,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:27,418 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:27,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 230 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 606 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-03-15 16:01:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 16:01:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 244. [2022-03-15 16:01:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2022-03-15 16:01:27,421 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 18 [2022-03-15 16:01:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:27,421 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2022-03-15 16:01:27,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2022-03-15 16:01:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:27,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:27,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:27,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-15 16:01:27,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 16:01:27,622 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1829339623, now seen corresponding path program 185 times [2022-03-15 16:01:27,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:27,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394773790] [2022-03-15 16:01:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:27,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:27,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394773790] [2022-03-15 16:01:27,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394773790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:27,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795562085] [2022-03-15 16:01:27,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:27,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:27,860 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 16:01:28,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:01:28,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:29,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:29,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 229 [2022-03-15 16:01:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:29,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 189 [2022-03-15 16:01:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:31,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:31,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 309 [2022-03-15 16:01:31,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:31,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 265 [2022-03-15 16:01:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:31,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795562085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:31,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:31,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:31,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667714306] [2022-03-15 16:01:31,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:31,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:31,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:31,779 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:33,060 INFO L93 Difference]: Finished difference Result 304 states and 752 transitions. [2022-03-15 16:01:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:01:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:33,061 INFO L225 Difference]: With dead ends: 304 [2022-03-15 16:01:33,061 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 16:01:33,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:01:33,061 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:33,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 557 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-15 16:01:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 16:01:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2022-03-15 16:01:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6265560165975104) internal successors, (633), 241 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 633 transitions. [2022-03-15 16:01:33,064 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 633 transitions. Word has length 18 [2022-03-15 16:01:33,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:33,064 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 633 transitions. [2022-03-15 16:01:33,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 633 transitions. [2022-03-15 16:01:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:33,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:33,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:33,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-15 16:01:33,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:33,267 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1738006753, now seen corresponding path program 186 times [2022-03-15 16:01:33,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:33,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309563552] [2022-03-15 16:01:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:33,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:33,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309563552] [2022-03-15 16:01:33,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309563552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:33,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258697276] [2022-03-15 16:01:33,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:33,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:33,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:33,538 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:33,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 16:01:33,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:01:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:34,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 204 [2022-03-15 16:01:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:34,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 180 [2022-03-15 16:01:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:36,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:36,865 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 554 treesize of output 484 [2022-03-15 16:01:36,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:36,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 478 treesize of output 432 [2022-03-15 16:01:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:37,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258697276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:37,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:37,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:01:37,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472360133] [2022-03-15 16:01:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:37,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:37,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:37,652 INFO L87 Difference]: Start difference. First operand 242 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:40,998 INFO L93 Difference]: Finished difference Result 392 states and 911 transitions. [2022-03-15 16:01:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:01:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:40,999 INFO L225 Difference]: With dead ends: 392 [2022-03-15 16:01:40,999 INFO L226 Difference]: Without dead ends: 366 [2022-03-15 16:01:40,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:01:40,999 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:40,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 358 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 861 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-03-15 16:01:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-15 16:01:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 246. [2022-03-15 16:01:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6408163265306124) internal successors, (647), 245 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 647 transitions. [2022-03-15 16:01:41,002 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 647 transitions. Word has length 18 [2022-03-15 16:01:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:41,003 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 647 transitions. [2022-03-15 16:01:41,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 647 transitions. [2022-03-15 16:01:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:41,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:41,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:41,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-15 16:01:41,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:41,210 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1786450349, now seen corresponding path program 187 times [2022-03-15 16:01:41,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:41,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027861144] [2022-03-15 16:01:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:41,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:41,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027861144] [2022-03-15 16:01:41,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027861144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:41,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249407532] [2022-03-15 16:01:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:41,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:41,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:41,418 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:41,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 16:01:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:42,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 189 treesize of output 165 [2022-03-15 16:01:42,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:42,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-03-15 16:01:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:42,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:44,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:44,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 490 treesize of output 432 [2022-03-15 16:01:44,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:44,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 426 treesize of output 356 [2022-03-15 16:01:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:45,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249407532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:45,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:45,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:01:45,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281449519] [2022-03-15 16:01:45,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:45,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:45,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:45,124 INFO L87 Difference]: Start difference. First operand 246 states and 647 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:46,256 INFO L93 Difference]: Finished difference Result 365 states and 871 transitions. [2022-03-15 16:01:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:01:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:46,257 INFO L225 Difference]: With dead ends: 365 [2022-03-15 16:01:46,257 INFO L226 Difference]: Without dead ends: 345 [2022-03-15 16:01:46,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:01:46,257 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:46,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 305 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 702 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-03-15 16:01:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-15 16:01:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 257. [2022-03-15 16:01:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.6484375) internal successors, (678), 256 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 678 transitions. [2022-03-15 16:01:46,260 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 678 transitions. Word has length 18 [2022-03-15 16:01:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:46,260 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 678 transitions. [2022-03-15 16:01:46,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 678 transitions. [2022-03-15 16:01:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:46,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:46,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:46,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-15 16:01:46,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2022-03-15 16:01:46,461 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1632989131, now seen corresponding path program 188 times [2022-03-15 16:01:46,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:46,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347528285] [2022-03-15 16:01:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:46,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:46,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347528285] [2022-03-15 16:01:46,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347528285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:46,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356427370] [2022-03-15 16:01:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:46,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:46,695 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 16:01:46,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:46,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:47,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:47,840 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 278 [2022-03-15 16:01:47,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:47,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 240 [2022-03-15 16:01:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:48,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:50,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:50,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 580 treesize of output 506 [2022-03-15 16:01:50,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:50,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 500 treesize of output 430 [2022-03-15 16:01:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:51,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356427370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:51,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:51,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:01:51,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100268950] [2022-03-15 16:01:51,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:51,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:51,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:51,188 INFO L87 Difference]: Start difference. First operand 257 states and 678 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:52,816 INFO L93 Difference]: Finished difference Result 379 states and 892 transitions. [2022-03-15 16:01:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:01:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:01:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:52,817 INFO L225 Difference]: With dead ends: 379 [2022-03-15 16:01:52,817 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 16:01:52,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:01:52,818 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:52,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 290 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 744 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-03-15 16:01:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 16:01:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2022-03-15 16:01:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6468253968253967) internal successors, (667), 252 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 667 transitions. [2022-03-15 16:01:52,821 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 667 transitions. Word has length 18 [2022-03-15 16:01:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:52,821 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 667 transitions. [2022-03-15 16:01:52,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 667 transitions. [2022-03-15 16:01:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:01:52,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:52,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:52,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-15 16:01:53,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:53,022 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:01:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1228263123, now seen corresponding path program 189 times [2022-03-15 16:01:53,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:53,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730981994] [2022-03-15 16:01:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:53,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:53,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730981994] [2022-03-15 16:01:53,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730981994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:53,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496454849] [2022-03-15 16:01:53,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:53,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:53,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:53,263 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:53,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 16:01:53,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:01:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:54,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 193 [2022-03-15 16:01:54,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:54,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 169 [2022-03-15 16:01:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:55,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:56,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:56,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 368 [2022-03-15 16:01:56,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:56,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 362 treesize of output 320 [2022-03-15 16:01:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:56,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496454849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:56,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:56,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:01:56,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984993594] [2022-03-15 16:01:56,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:56,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:56,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:56,890 INFO L87 Difference]: Start difference. First operand 253 states and 667 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:00,058 INFO L93 Difference]: Finished difference Result 433 states and 979 transitions. [2022-03-15 16:02:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:02:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:00,058 INFO L225 Difference]: With dead ends: 433 [2022-03-15 16:02:00,059 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 16:02:00,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:02:00,059 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:00,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 356 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 972 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-03-15 16:02:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 16:02:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 256. [2022-03-15 16:02:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.6549019607843136) internal successors, (677), 255 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 677 transitions. [2022-03-15 16:02:00,062 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 677 transitions. Word has length 18 [2022-03-15 16:02:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:00,062 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 677 transitions. [2022-03-15 16:02:00,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 677 transitions. [2022-03-15 16:02:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:00,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:00,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:00,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-15 16:02:00,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:00,263 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -683945573, now seen corresponding path program 190 times [2022-03-15 16:02:00,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:00,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542633306] [2022-03-15 16:02:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:00,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:00,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542633306] [2022-03-15 16:02:00,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542633306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:00,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442875464] [2022-03-15 16:02:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:00,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:00,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:00,475 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 16:02:00,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:00,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:00,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:01,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 181 [2022-03-15 16:02:01,136 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 185 treesize of output 161 [2022-03-15 16:02:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:01,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:03,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:03,061 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 453 treesize of output 413 [2022-03-15 16:02:03,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:03,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 359 [2022-03-15 16:02:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:03,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442875464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:03,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:03,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 16:02:03,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688101611] [2022-03-15 16:02:03,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:03,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:03,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:03,741 INFO L87 Difference]: Start difference. First operand 256 states and 677 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:05,638 INFO L93 Difference]: Finished difference Result 469 states and 1084 transitions. [2022-03-15 16:02:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:02:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:05,639 INFO L225 Difference]: With dead ends: 469 [2022-03-15 16:02:05,639 INFO L226 Difference]: Without dead ends: 442 [2022-03-15 16:02:05,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:02:05,640 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:05,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 446 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:02:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-15 16:02:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 274. [2022-03-15 16:02:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.6923076923076925) internal successors, (735), 273 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 735 transitions. [2022-03-15 16:02:05,643 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 735 transitions. Word has length 18 [2022-03-15 16:02:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:05,643 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 735 transitions. [2022-03-15 16:02:05,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 735 transitions. [2022-03-15 16:02:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:05,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:05,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:05,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-15 16:02:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:05,845 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 215570591, now seen corresponding path program 191 times [2022-03-15 16:02:05,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:05,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368314580] [2022-03-15 16:02:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:05,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:06,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:06,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368314580] [2022-03-15 16:02:06,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368314580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:06,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089929436] [2022-03-15 16:02:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:06,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:06,049 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:06,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 16:02:06,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:02:06,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:06,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:06,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 360 treesize of output 304 [2022-03-15 16:02:06,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 270 [2022-03-15 16:02:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:08,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:08,660 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 311 treesize of output 287 [2022-03-15 16:02:08,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:08,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 263 [2022-03-15 16:02:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:09,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089929436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:09,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:09,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 16:02:09,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390744432] [2022-03-15 16:02:09,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:09,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:09,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:09,651 INFO L87 Difference]: Start difference. First operand 274 states and 735 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:12,936 INFO L93 Difference]: Finished difference Result 584 states and 1263 transitions. [2022-03-15 16:02:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:02:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:12,938 INFO L225 Difference]: With dead ends: 584 [2022-03-15 16:02:12,938 INFO L226 Difference]: Without dead ends: 529 [2022-03-15 16:02:12,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:02:12,938 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 137 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:12,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 486 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:02:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-15 16:02:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 276. [2022-03-15 16:02:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.672727272727273) internal successors, (735), 275 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 735 transitions. [2022-03-15 16:02:12,942 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 735 transitions. Word has length 18 [2022-03-15 16:02:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:12,942 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 735 transitions. [2022-03-15 16:02:12,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 735 transitions. [2022-03-15 16:02:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:12,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:12,943 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:12,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:13,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:13,151 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1863026603, now seen corresponding path program 192 times [2022-03-15 16:02:13,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:13,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781315716] [2022-03-15 16:02:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:13,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:13,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781315716] [2022-03-15 16:02:13,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781315716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:13,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353694871] [2022-03-15 16:02:13,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:13,232 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:13,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 16:02:13,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:02:13,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:13,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:02:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:13,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:13,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 16:02:13,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:13,730 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:02:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:13,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:13,915 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:13,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-15 16:02:13,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-15 16:02:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:13,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353694871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:13,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:13,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 16:02:13,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541694332] [2022-03-15 16:02:13,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:02:13,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:02:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:02:13,977 INFO L87 Difference]: Start difference. First operand 276 states and 735 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:14,095 INFO L93 Difference]: Finished difference Result 302 states and 786 transitions. [2022-03-15 16:02:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:02:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:14,096 INFO L225 Difference]: With dead ends: 302 [2022-03-15 16:02:14,096 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 16:02:14,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:14,096 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:14,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 139 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-15 16:02:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 16:02:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2022-03-15 16:02:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.672794117647059) internal successors, (727), 272 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 727 transitions. [2022-03-15 16:02:14,101 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 727 transitions. Word has length 18 [2022-03-15 16:02:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:14,101 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 727 transitions. [2022-03-15 16:02:14,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 727 transitions. [2022-03-15 16:02:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:14,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:14,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:14,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:14,302 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1291281747, now seen corresponding path program 193 times [2022-03-15 16:02:14,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:14,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56187125] [2022-03-15 16:02:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:14,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:14,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:14,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56187125] [2022-03-15 16:02:14,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56187125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:14,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913377413] [2022-03-15 16:02:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:14,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:14,526 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:14,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 16:02:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:02:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:14,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 171 [2022-03-15 16:02:14,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 153 [2022-03-15 16:02:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:15,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:16,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:16,574 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 269 treesize of output 253 [2022-03-15 16:02:16,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:16,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 248 [2022-03-15 16:02:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:17,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913377413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:17,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:17,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 16:02:17,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761902725] [2022-03-15 16:02:17,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:17,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:17,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:17,121 INFO L87 Difference]: Start difference. First operand 273 states and 727 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:17,968 INFO L93 Difference]: Finished difference Result 410 states and 990 transitions. [2022-03-15 16:02:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:02:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:17,969 INFO L225 Difference]: With dead ends: 410 [2022-03-15 16:02:17,969 INFO L226 Difference]: Without dead ends: 392 [2022-03-15 16:02:17,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:17,970 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:17,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 282 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:02:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-03-15 16:02:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 280. [2022-03-15 16:02:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.6917562724014337) internal successors, (751), 279 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 751 transitions. [2022-03-15 16:02:17,973 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 751 transitions. Word has length 18 [2022-03-15 16:02:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:17,973 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 751 transitions. [2022-03-15 16:02:17,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 751 transitions. [2022-03-15 16:02:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:17,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:17,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:17,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-15 16:02:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:18,174 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash 710408265, now seen corresponding path program 194 times [2022-03-15 16:02:18,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:18,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865701310] [2022-03-15 16:02:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:18,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:18,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:18,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865701310] [2022-03-15 16:02:18,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865701310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:18,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221574255] [2022-03-15 16:02:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:18,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:18,411 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:18,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 16:02:18,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:19,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 272 [2022-03-15 16:02:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:19,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 234 [2022-03-15 16:02:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:21,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:21,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 461 treesize of output 419 [2022-03-15 16:02:21,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:21,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 413 treesize of output 363 [2022-03-15 16:02:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:22,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221574255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:22,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:22,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:22,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658133517] [2022-03-15 16:02:22,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:22,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:22,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:22,030 INFO L87 Difference]: Start difference. First operand 280 states and 751 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:22,989 INFO L93 Difference]: Finished difference Result 426 states and 1016 transitions. [2022-03-15 16:02:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:02:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:22,990 INFO L225 Difference]: With dead ends: 426 [2022-03-15 16:02:22,990 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 16:02:22,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:02:22,991 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:22,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 357 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 830 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-03-15 16:02:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 16:02:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 304. [2022-03-15 16:02:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6864686468646863) internal successors, (814), 303 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 814 transitions. [2022-03-15 16:02:22,994 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 814 transitions. Word has length 18 [2022-03-15 16:02:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:22,994 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 814 transitions. [2022-03-15 16:02:22,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 814 transitions. [2022-03-15 16:02:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:22,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:22,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:23,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:23,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 16:02:23,195 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash 863869483, now seen corresponding path program 195 times [2022-03-15 16:02:23,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:23,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766117545] [2022-03-15 16:02:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:23,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:23,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766117545] [2022-03-15 16:02:23,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766117545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:23,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256547962] [2022-03-15 16:02:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:02:23,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:23,418 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:23,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 16:02:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:02:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:24,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:24,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 195 treesize of output 165 [2022-03-15 16:02:24,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:24,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-03-15 16:02:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:24,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:26,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:26,714 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 447 treesize of output 381 [2022-03-15 16:02:26,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:26,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 325 [2022-03-15 16:02:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:27,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256547962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:27,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:27,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:27,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679993933] [2022-03-15 16:02:27,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:27,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:27,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:27,417 INFO L87 Difference]: Start difference. First operand 304 states and 814 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:28,524 INFO L93 Difference]: Finished difference Result 419 states and 999 transitions. [2022-03-15 16:02:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:02:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:28,524 INFO L225 Difference]: With dead ends: 419 [2022-03-15 16:02:28,525 INFO L226 Difference]: Without dead ends: 406 [2022-03-15 16:02:28,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:02:28,525 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 449 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 854 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-03-15 16:02:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-15 16:02:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 300. [2022-03-15 16:02:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.68561872909699) internal successors, (803), 299 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 803 transitions. [2022-03-15 16:02:28,528 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 803 transitions. Word has length 18 [2022-03-15 16:02:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:28,528 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 803 transitions. [2022-03-15 16:02:28,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 803 transitions. [2022-03-15 16:02:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:28,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:28,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:28,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:28,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 16:02:28,729 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1857015373, now seen corresponding path program 196 times [2022-03-15 16:02:28,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:28,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512895729] [2022-03-15 16:02:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:28,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:28,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512895729] [2022-03-15 16:02:28,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512895729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:28,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850935505] [2022-03-15 16:02:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:28,962 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:28,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 16:02:29,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:29,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:30,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:30,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 318 treesize of output 266 [2022-03-15 16:02:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:30,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 270 treesize of output 234 [2022-03-15 16:02:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:30,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:32,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:32,004 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 486 treesize of output 448 [2022-03-15 16:02:32,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:32,014 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 442 treesize of output 380 [2022-03-15 16:02:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:32,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850935505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:32,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:32,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:32,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844989542] [2022-03-15 16:02:32,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:32,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:32,593 INFO L87 Difference]: Start difference. First operand 300 states and 803 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:33,392 INFO L93 Difference]: Finished difference Result 446 states and 1053 transitions. [2022-03-15 16:02:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:02:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:33,393 INFO L225 Difference]: With dead ends: 446 [2022-03-15 16:02:33,393 INFO L226 Difference]: Without dead ends: 423 [2022-03-15 16:02:33,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:33,393 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 80 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:33,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 384 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 695 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-03-15 16:02:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-15 16:02:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 303. [2022-03-15 16:02:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6887417218543046) internal successors, (812), 302 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 812 transitions. [2022-03-15 16:02:33,397 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 812 transitions. Word has length 18 [2022-03-15 16:02:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 812 transitions. [2022-03-15 16:02:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 812 transitions. [2022-03-15 16:02:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:33,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:33,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:33,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:33,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 16:02:33,598 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -322754615, now seen corresponding path program 197 times [2022-03-15 16:02:33,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:33,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502025616] [2022-03-15 16:02:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:33,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:33,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:33,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502025616] [2022-03-15 16:02:33,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502025616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:33,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140181148] [2022-03-15 16:02:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:33,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:33,836 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:33,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 16:02:34,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:02:34,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:35,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 224 [2022-03-15 16:02:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:35,080 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 228 treesize of output 198 [2022-03-15 16:02:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:35,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:37,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:37,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 418 [2022-03-15 16:02:37,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:37,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 362 [2022-03-15 16:02:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:37,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140181148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:37,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:37,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:37,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132457152] [2022-03-15 16:02:37,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:37,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:37,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:37,945 INFO L87 Difference]: Start difference. First operand 303 states and 812 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:39,260 INFO L93 Difference]: Finished difference Result 432 states and 1038 transitions. [2022-03-15 16:02:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:02:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:39,261 INFO L225 Difference]: With dead ends: 432 [2022-03-15 16:02:39,261 INFO L226 Difference]: Without dead ends: 415 [2022-03-15 16:02:39,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:02:39,261 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:39,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 408 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 740 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-03-15 16:02:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-15 16:02:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 307. [2022-03-15 16:02:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.683006535947712) internal successors, (821), 306 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) [2022-03-15 16:02:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 821 transitions. [2022-03-15 16:02:39,265 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 821 transitions. Word has length 18 [2022-03-15 16:02:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:39,265 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 821 transitions. [2022-03-15 16:02:39,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 821 transitions. [2022-03-15 16:02:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:39,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:39,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:39,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-15 16:02:39,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 16:02:39,466 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash -150859371, now seen corresponding path program 198 times [2022-03-15 16:02:39,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:39,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909537154] [2022-03-15 16:02:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:39,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:39,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909537154] [2022-03-15 16:02:39,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909537154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:39,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506989627] [2022-03-15 16:02:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:39,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:39,701 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:39,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 16:02:39,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:02:39,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:40,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 16:02:40,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:40,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 156 [2022-03-15 16:02:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:42,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:42,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 460 treesize of output 406 [2022-03-15 16:02:42,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:42,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 362 [2022-03-15 16:02:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:43,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506989627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:43,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:43,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:43,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591551984] [2022-03-15 16:02:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:43,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:43,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:43,419 INFO L87 Difference]: Start difference. First operand 307 states and 821 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:45,039 INFO L93 Difference]: Finished difference Result 433 states and 1034 transitions. [2022-03-15 16:02:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:02:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:45,040 INFO L225 Difference]: With dead ends: 433 [2022-03-15 16:02:45,040 INFO L226 Difference]: Without dead ends: 426 [2022-03-15 16:02:45,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:02:45,040 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:45,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 396 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 823 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2022-03-15 16:02:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-15 16:02:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 305. [2022-03-15 16:02:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6907894736842106) internal successors, (818), 304 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 818 transitions. [2022-03-15 16:02:45,044 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 818 transitions. Word has length 18 [2022-03-15 16:02:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:45,044 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 818 transitions. [2022-03-15 16:02:45,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 818 transitions. [2022-03-15 16:02:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:45,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:45,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:45,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 16:02:45,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:45,245 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash 576761549, now seen corresponding path program 199 times [2022-03-15 16:02:45,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:45,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672675768] [2022-03-15 16:02:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:45,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:45,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672675768] [2022-03-15 16:02:45,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672675768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:45,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561681416] [2022-03-15 16:02:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:45,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:45,493 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:45,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 16:02:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:46,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 324 [2022-03-15 16:02:46,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:46,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 328 treesize of output 288 [2022-03-15 16:02:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:47,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:48,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:48,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 535 treesize of output 469 [2022-03-15 16:02:48,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:48,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 463 treesize of output 417 [2022-03-15 16:02:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:49,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561681416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:49,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:49,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:49,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098016826] [2022-03-15 16:02:49,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:49,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:49,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:49,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:49,407 INFO L87 Difference]: Start difference. First operand 305 states and 818 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:54,353 INFO L93 Difference]: Finished difference Result 555 states and 1231 transitions. [2022-03-15 16:02:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:02:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:54,354 INFO L225 Difference]: With dead ends: 555 [2022-03-15 16:02:54,354 INFO L226 Difference]: Without dead ends: 515 [2022-03-15 16:02:54,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:02:54,355 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:54,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 410 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 917 Invalid, 0 Unknown, 127 Unchecked, 0.5s Time] [2022-03-15 16:02:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-15 16:02:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 306. [2022-03-15 16:02:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6885245901639343) internal successors, (820), 305 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 820 transitions. [2022-03-15 16:02:54,359 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 820 transitions. Word has length 18 [2022-03-15 16:02:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:54,359 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 820 transitions. [2022-03-15 16:02:54,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:02:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 820 transitions. [2022-03-15 16:02:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:54,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:54,359 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:54,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:54,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-15 16:02:54,560 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2006596403, now seen corresponding path program 200 times [2022-03-15 16:02:54,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:54,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285335854] [2022-03-15 16:02:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:54,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:54,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285335854] [2022-03-15 16:02:54,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285335854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:54,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614198280] [2022-03-15 16:02:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:54,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:54,787 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:54,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 16:02:54,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:54,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:02:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:55,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:55,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 165 [2022-03-15 16:02:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:55,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 169 treesize of output 147 [2022-03-15 16:02:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:57,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:57,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 505 treesize of output 451 [2022-03-15 16:02:57,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:02:57,660 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 445 treesize of output 387 [2022-03-15 16:02:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:58,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614198280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:58,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:58,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:02:58,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009093683] [2022-03-15 16:02:58,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:58,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:58,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:58,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:58,438 INFO L87 Difference]: Start difference. First operand 306 states and 820 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:59,677 INFO L93 Difference]: Finished difference Result 430 states and 1048 transitions. [2022-03-15 16:02:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:02:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:02:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:59,678 INFO L225 Difference]: With dead ends: 430 [2022-03-15 16:02:59,678 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 16:02:59,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:02:59,678 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:59,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 347 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 824 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-03-15 16:02:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 16:02:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 318. [2022-03-15 16:02:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.678233438485804) internal successors, (849), 317 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 849 transitions. [2022-03-15 16:02:59,681 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 849 transitions. Word has length 18 [2022-03-15 16:02:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 849 transitions. [2022-03-15 16:02:59,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 849 transitions. [2022-03-15 16:02:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:02:59,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:59,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:59,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-15 16:02:59,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-15 16:02:59,883 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:02:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1853135185, now seen corresponding path program 201 times [2022-03-15 16:02:59,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:59,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027636494] [2022-03-15 16:02:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:00,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:00,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027636494] [2022-03-15 16:03:00,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027636494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:00,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195539304] [2022-03-15 16:03:00,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:03:00,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:00,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:00,116 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:00,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 16:03:00,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:03:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:01,081 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 175 [2022-03-15 16:03:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:01,084 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-15 16:03:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:01,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:02,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:02,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 299 [2022-03-15 16:03:02,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:02,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 271 [2022-03-15 16:03:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:03,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195539304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:03,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:03,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:03:03,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479752757] [2022-03-15 16:03:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:03,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:03:03,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:03:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:03:03,347 INFO L87 Difference]: Start difference. First operand 318 states and 849 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:04,579 INFO L93 Difference]: Finished difference Result 434 states and 1036 transitions. [2022-03-15 16:03:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:03:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:04,580 INFO L225 Difference]: With dead ends: 434 [2022-03-15 16:03:04,580 INFO L226 Difference]: Without dead ends: 418 [2022-03-15 16:03:04,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:03:04,580 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:04,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 336 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 920 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2022-03-15 16:03:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-15 16:03:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2022-03-15 16:03:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.6893203883495147) internal successors, (831), 309 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 831 transitions. [2022-03-15 16:03:04,584 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 831 transitions. Word has length 18 [2022-03-15 16:03:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:04,584 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 831 transitions. [2022-03-15 16:03:04,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 831 transitions. [2022-03-15 16:03:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:04,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:04,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:04,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:04,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:04,785 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 108600905, now seen corresponding path program 202 times [2022-03-15 16:03:04,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:04,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496523297] [2022-03-15 16:03:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:04,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:04,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496523297] [2022-03-15 16:03:04,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496523297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:04,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309924177] [2022-03-15 16:03:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:03:04,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:04,996 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:04,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 16:03:05,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:03:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:05,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:05,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 171 [2022-03-15 16:03:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:05,894 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 153 [2022-03-15 16:03:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:08,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:08,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 495 treesize of output 437 [2022-03-15 16:03:08,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:08,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 431 treesize of output 371 [2022-03-15 16:03:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:08,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309924177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:08,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:08,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:03:08,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716968258] [2022-03-15 16:03:08,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:03:08,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:03:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:03:08,808 INFO L87 Difference]: Start difference. First operand 310 states and 831 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:09,715 INFO L93 Difference]: Finished difference Result 422 states and 1031 transitions. [2022-03-15 16:03:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:03:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:09,716 INFO L225 Difference]: With dead ends: 422 [2022-03-15 16:03:09,716 INFO L226 Difference]: Without dead ends: 405 [2022-03-15 16:03:09,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:03:09,716 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:09,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 337 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 736 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-03-15 16:03:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-15 16:03:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 315. [2022-03-15 16:03:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.6847133757961785) internal successors, (843), 314 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 843 transitions. [2022-03-15 16:03:09,720 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 843 transitions. Word has length 18 [2022-03-15 16:03:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:09,720 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 843 transitions. [2022-03-15 16:03:09,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 843 transitions. [2022-03-15 16:03:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:09,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:09,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:09,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:09,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:09,921 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 280496149, now seen corresponding path program 203 times [2022-03-15 16:03:09,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:09,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385472259] [2022-03-15 16:03:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:09,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:10,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:10,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385472259] [2022-03-15 16:03:10,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385472259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:10,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856929107] [2022-03-15 16:03:10,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:03:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:10,140 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:10,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 16:03:10,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:03:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:11,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:11,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 293 [2022-03-15 16:03:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:11,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 297 treesize of output 255 [2022-03-15 16:03:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:13,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:13,275 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 390 treesize of output 348 [2022-03-15 16:03:13,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:13,285 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 342 treesize of output 304 [2022-03-15 16:03:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:13,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856929107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:13,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:13,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:03:13,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319545824] [2022-03-15 16:03:13,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:13,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:03:13,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:03:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:03:13,988 INFO L87 Difference]: Start difference. First operand 315 states and 843 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:15,352 INFO L93 Difference]: Finished difference Result 433 states and 1032 transitions. [2022-03-15 16:03:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:03:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:15,353 INFO L225 Difference]: With dead ends: 433 [2022-03-15 16:03:15,353 INFO L226 Difference]: Without dead ends: 423 [2022-03-15 16:03:15,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:03:15,354 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:15,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 341 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 845 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2022-03-15 16:03:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-15 16:03:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 307. [2022-03-15 16:03:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.689542483660131) internal successors, (823), 306 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 823 transitions. [2022-03-15 16:03:15,357 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 823 transitions. Word has length 18 [2022-03-15 16:03:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:15,357 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 823 transitions. [2022-03-15 16:03:15,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 823 transitions. [2022-03-15 16:03:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:15,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:15,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:15,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-15 16:03:15,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-15 16:03:15,558 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1008117069, now seen corresponding path program 204 times [2022-03-15 16:03:15,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:15,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086056959] [2022-03-15 16:03:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:15,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:15,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086056959] [2022-03-15 16:03:15,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086056959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:15,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361551621] [2022-03-15 16:03:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:03:15,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:15,821 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 16:03:16,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:03:16,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:16,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:16,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 348 treesize of output 306 [2022-03-15 16:03:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:16,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 264 [2022-03-15 16:03:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:19,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:19,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 382 [2022-03-15 16:03:19,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:19,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 326 [2022-03-15 16:03:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:19,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361551621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:19,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:19,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:03:19,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524629546] [2022-03-15 16:03:19,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:19,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:03:19,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:03:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:19,997 INFO L87 Difference]: Start difference. First operand 307 states and 823 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:21,864 INFO L93 Difference]: Finished difference Result 521 states and 1197 transitions. [2022-03-15 16:03:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:03:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:21,865 INFO L225 Difference]: With dead ends: 521 [2022-03-15 16:03:21,865 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 16:03:21,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:03:21,866 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:21,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 347 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 909 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2022-03-15 16:03:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 16:03:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2022-03-15 16:03:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.6621160409556315) internal successors, (780), 293 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 780 transitions. [2022-03-15 16:03:21,869 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 780 transitions. Word has length 18 [2022-03-15 16:03:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:21,870 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 780 transitions. [2022-03-15 16:03:21,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 780 transitions. [2022-03-15 16:03:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:21,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:21,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:21,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:22,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-15 16:03:22,071 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2062178249, now seen corresponding path program 205 times [2022-03-15 16:03:22,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:22,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848129512] [2022-03-15 16:03:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:22,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:22,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848129512] [2022-03-15 16:03:22,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848129512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:22,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588744278] [2022-03-15 16:03:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:03:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:22,261 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:22,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 16:03:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:22,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 292 [2022-03-15 16:03:22,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 254 [2022-03-15 16:03:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:23,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:24,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:24,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 457 treesize of output 407 [2022-03-15 16:03:24,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:24,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 403 treesize of output 359 [2022-03-15 16:03:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:25,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588744278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:25,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:25,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:03:25,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893412326] [2022-03-15 16:03:25,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:25,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:25,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:25,420 INFO L87 Difference]: Start difference. First operand 294 states and 780 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:27,208 INFO L93 Difference]: Finished difference Result 500 states and 1175 transitions. [2022-03-15 16:03:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:03:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:27,209 INFO L225 Difference]: With dead ends: 500 [2022-03-15 16:03:27,209 INFO L226 Difference]: Without dead ends: 467 [2022-03-15 16:03:27,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:03:27,209 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:27,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 269 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:03:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-15 16:03:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 318. [2022-03-15 16:03:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.7066246056782335) internal successors, (858), 317 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) [2022-03-15 16:03:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 858 transitions. [2022-03-15 16:03:27,213 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 858 transitions. Word has length 18 [2022-03-15 16:03:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:27,213 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 858 transitions. [2022-03-15 16:03:27,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 858 transitions. [2022-03-15 16:03:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:27,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:27,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:27,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-15 16:03:27,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:27,414 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1333272883, now seen corresponding path program 206 times [2022-03-15 16:03:27,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:27,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853896794] [2022-03-15 16:03:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:27,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:27,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853896794] [2022-03-15 16:03:27,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853896794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:27,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424788063] [2022-03-15 16:03:27,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:03:27,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:27,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:27,660 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:27,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 16:03:27,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:03:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:27,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:28,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:28,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 409 treesize of output 343 [2022-03-15 16:03:28,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:28,511 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 347 treesize of output 303 [2022-03-15 16:03:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:29,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:30,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:30,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 293 [2022-03-15 16:03:30,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:30,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 269 [2022-03-15 16:03:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:31,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424788063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:31,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:31,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:03:31,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689304788] [2022-03-15 16:03:31,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:31,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:31,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:31,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:31,445 INFO L87 Difference]: Start difference. First operand 318 states and 858 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:33,599 INFO L93 Difference]: Finished difference Result 559 states and 1263 transitions. [2022-03-15 16:03:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:03:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:33,600 INFO L225 Difference]: With dead ends: 559 [2022-03-15 16:03:33,600 INFO L226 Difference]: Without dead ends: 516 [2022-03-15 16:03:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1987, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:03:33,600 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 169 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 465 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1169 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-03-15 16:03:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-15 16:03:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 319. [2022-03-15 16:03:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.69811320754717) internal successors, (858), 318 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) [2022-03-15 16:03:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 858 transitions. [2022-03-15 16:03:33,605 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 858 transitions. Word has length 18 [2022-03-15 16:03:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:33,605 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 858 transitions. [2022-03-15 16:03:33,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 858 transitions. [2022-03-15 16:03:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:33,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:33,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:33,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-15 16:03:33,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-15 16:03:33,806 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash -257561727, now seen corresponding path program 207 times [2022-03-15 16:03:33,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:33,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687372371] [2022-03-15 16:03:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:33,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:33,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687372371] [2022-03-15 16:03:33,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687372371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:33,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32443081] [2022-03-15 16:03:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:03:33,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:33,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:33,992 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 16:03:34,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:03:34,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:34,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 398 treesize of output 332 [2022-03-15 16:03:34,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 296 [2022-03-15 16:03:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:35,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:36,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:36,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 411 treesize of output 383 [2022-03-15 16:03:36,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:36,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 335 [2022-03-15 16:03:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:37,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32443081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:37,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:37,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 16:03:37,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193299238] [2022-03-15 16:03:37,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:37,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:37,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:37,224 INFO L87 Difference]: Start difference. First operand 319 states and 858 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:40,267 INFO L93 Difference]: Finished difference Result 583 states and 1311 transitions. [2022-03-15 16:03:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:03:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:40,268 INFO L225 Difference]: With dead ends: 583 [2022-03-15 16:03:40,268 INFO L226 Difference]: Without dead ends: 540 [2022-03-15 16:03:40,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:03:40,268 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 125 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:40,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 519 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:03:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-03-15 16:03:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 323. [2022-03-15 16:03:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2022-03-15 16:03:40,273 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 18 [2022-03-15 16:03:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:40,273 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2022-03-15 16:03:40,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2022-03-15 16:03:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:40,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:40,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:40,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-15 16:03:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 16:03:40,474 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1270254259, now seen corresponding path program 208 times [2022-03-15 16:03:40,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:40,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94781270] [2022-03-15 16:03:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:40,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:40,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94781270] [2022-03-15 16:03:40,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94781270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:40,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474097908] [2022-03-15 16:03:40,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:03:40,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:40,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:40,705 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:40,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 16:03:40,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:03:40,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:41,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:41,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 287 [2022-03-15 16:03:41,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:41,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 291 treesize of output 247 [2022-03-15 16:03:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:42,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:44,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:44,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 410 treesize of output 368 [2022-03-15 16:03:44,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:44,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 362 treesize of output 316 [2022-03-15 16:03:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:45,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474097908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:45,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:45,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:03:45,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857491487] [2022-03-15 16:03:45,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:03:45,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:03:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:03:45,171 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:47,232 INFO L93 Difference]: Finished difference Result 555 states and 1293 transitions. [2022-03-15 16:03:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:03:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:47,233 INFO L225 Difference]: With dead ends: 555 [2022-03-15 16:03:47,233 INFO L226 Difference]: Without dead ends: 515 [2022-03-15 16:03:47,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:03:47,233 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 175 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:47,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 375 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 953 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2022-03-15 16:03:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-15 16:03:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 329. [2022-03-15 16:03:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.707317073170732) internal successors, (888), 328 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 888 transitions. [2022-03-15 16:03:47,237 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 888 transitions. Word has length 18 [2022-03-15 16:03:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:47,237 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 888 transitions. [2022-03-15 16:03:47,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 888 transitions. [2022-03-15 16:03:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:47,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:47,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:47,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-15 16:03:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 16:03:47,438 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1864305613, now seen corresponding path program 209 times [2022-03-15 16:03:47,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:47,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675927687] [2022-03-15 16:03:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:47,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:47,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675927687] [2022-03-15 16:03:47,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675927687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:47,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035330231] [2022-03-15 16:03:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:03:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:47,680 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:47,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 16:03:47,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:03:47,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:48,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 16:03:48,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:48,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 205 treesize of output 177 [2022-03-15 16:03:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:49,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:50,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:50,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 358 [2022-03-15 16:03:50,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:50,566 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 352 treesize of output 322 [2022-03-15 16:03:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:51,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035330231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:51,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:51,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:03:51,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379983368] [2022-03-15 16:03:51,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:03:51,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:03:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:03:51,137 INFO L87 Difference]: Start difference. First operand 329 states and 888 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:52,235 INFO L93 Difference]: Finished difference Result 478 states and 1152 transitions. [2022-03-15 16:03:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:03:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:52,236 INFO L225 Difference]: With dead ends: 478 [2022-03-15 16:03:52,236 INFO L226 Difference]: Without dead ends: 456 [2022-03-15 16:03:52,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:03:52,236 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:52,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 287 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 601 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-03-15 16:03:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-15 16:03:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 328. [2022-03-15 16:03:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.706422018348624) internal successors, (885), 327 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 885 transitions. [2022-03-15 16:03:52,240 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 885 transitions. Word has length 18 [2022-03-15 16:03:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:52,240 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 885 transitions. [2022-03-15 16:03:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 885 transitions. [2022-03-15 16:03:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:52,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:52,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:52,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-15 16:03:52,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:52,441 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1895431881, now seen corresponding path program 210 times [2022-03-15 16:03:52,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:52,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134005956] [2022-03-15 16:03:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:52,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:52,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134005956] [2022-03-15 16:03:52,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134005956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:52,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239460811] [2022-03-15 16:03:52,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:03:52,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:52,659 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 16:03:52,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:03:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:52,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:52,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:53,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 231 [2022-03-15 16:03:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:53,527 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 203 [2022-03-15 16:03:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:53,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:55,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:55,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 306 [2022-03-15 16:03:55,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:55,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 270 [2022-03-15 16:03:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:55,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239460811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:55,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:55,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:03:55,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138870232] [2022-03-15 16:03:55,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:55,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:03:55,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:03:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:55,917 INFO L87 Difference]: Start difference. First operand 328 states and 885 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:56,906 INFO L93 Difference]: Finished difference Result 487 states and 1150 transitions. [2022-03-15 16:03:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:03:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:03:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:56,907 INFO L225 Difference]: With dead ends: 487 [2022-03-15 16:03:56,907 INFO L226 Difference]: Without dead ends: 461 [2022-03-15 16:03:56,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:03:56,907 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:56,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 389 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 871 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-03-15 16:03:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-15 16:03:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 327. [2022-03-15 16:03:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6901840490797544) internal successors, (877), 326 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 877 transitions. [2022-03-15 16:03:56,911 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 877 transitions. Word has length 18 [2022-03-15 16:03:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:56,911 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 877 transitions. [2022-03-15 16:03:56,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 877 transitions. [2022-03-15 16:03:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:03:56,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:56,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:56,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:57,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-15 16:03:57,112 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:03:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -546218405, now seen corresponding path program 211 times [2022-03-15 16:03:57,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:57,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722780575] [2022-03-15 16:03:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:57,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:57,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722780575] [2022-03-15 16:03:57,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722780575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:57,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801653810] [2022-03-15 16:03:57,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:03:57,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:57,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:57,380 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:57,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 16:03:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:03:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:58,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 274 [2022-03-15 16:03:58,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:58,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 278 treesize of output 234 [2022-03-15 16:03:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:01,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:01,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 454 treesize of output 392 [2022-03-15 16:04:01,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:01,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 386 treesize of output 328 [2022-03-15 16:04:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:01,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801653810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:01,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:01,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:01,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056570624] [2022-03-15 16:04:01,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:01,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:01,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:01,649 INFO L87 Difference]: Start difference. First operand 327 states and 877 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:02,701 INFO L93 Difference]: Finished difference Result 508 states and 1251 transitions. [2022-03-15 16:04:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:04:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:02,702 INFO L225 Difference]: With dead ends: 508 [2022-03-15 16:04:02,702 INFO L226 Difference]: Without dead ends: 488 [2022-03-15 16:04:02,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:04:02,703 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:02,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 388 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 718 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-03-15 16:04:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-15 16:04:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 379. [2022-03-15 16:04:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.7116402116402116) internal successors, (1025), 378 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1025 transitions. [2022-03-15 16:04:02,707 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1025 transitions. Word has length 18 [2022-03-15 16:04:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:02,707 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1025 transitions. [2022-03-15 16:04:02,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1025 transitions. [2022-03-15 16:04:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:02,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:02,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:02,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-15 16:04:02,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:02,924 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash -392757187, now seen corresponding path program 212 times [2022-03-15 16:04:02,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:02,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291207070] [2022-03-15 16:04:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:03,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:03,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291207070] [2022-03-15 16:04:03,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291207070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:03,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092635497] [2022-03-15 16:04:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:04:03,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:03,154 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:03,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 16:04:03,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:04,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:04,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 235 treesize of output 205 [2022-03-15 16:04:04,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:04,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 181 [2022-03-15 16:04:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:05,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:07,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:07,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 454 treesize of output 396 [2022-03-15 16:04:07,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:07,083 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 390 treesize of output 328 [2022-03-15 16:04:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:07,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092635497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:07,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:07,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:07,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588295422] [2022-03-15 16:04:07,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:07,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:07,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:07,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:07,689 INFO L87 Difference]: Start difference. First operand 379 states and 1025 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:08,677 INFO L93 Difference]: Finished difference Result 523 states and 1254 transitions. [2022-03-15 16:04:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:04:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:08,678 INFO L225 Difference]: With dead ends: 523 [2022-03-15 16:04:08,678 INFO L226 Difference]: Without dead ends: 509 [2022-03-15 16:04:08,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:04:08,678 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:08,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 379 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 769 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-03-15 16:04:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-15 16:04:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 361. [2022-03-15 16:04:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.727777777777778) internal successors, (982), 360 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 982 transitions. [2022-03-15 16:04:08,682 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 982 transitions. Word has length 18 [2022-03-15 16:04:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:08,683 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 982 transitions. [2022-03-15 16:04:08,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 982 transitions. [2022-03-15 16:04:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:08,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:08,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:08,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-15 16:04:08,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-15 16:04:08,884 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 600388703, now seen corresponding path program 213 times [2022-03-15 16:04:08,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:08,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079699700] [2022-03-15 16:04:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:09,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:09,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079699700] [2022-03-15 16:04:09,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079699700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:09,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739046704] [2022-03-15 16:04:09,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:04:09,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:09,113 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:09,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 16:04:09,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:04:09,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:10,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:10,447 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 274 [2022-03-15 16:04:10,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:10,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 240 [2022-03-15 16:04:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:11,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:12,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:12,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 490 treesize of output 440 [2022-03-15 16:04:12,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:12,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 434 treesize of output 380 [2022-03-15 16:04:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:13,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739046704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:13,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:13,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:13,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437824280] [2022-03-15 16:04:13,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:13,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:13,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:13,391 INFO L87 Difference]: Start difference. First operand 361 states and 982 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:14,648 INFO L93 Difference]: Finished difference Result 544 states and 1312 transitions. [2022-03-15 16:04:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:04:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:14,649 INFO L225 Difference]: With dead ends: 544 [2022-03-15 16:04:14,650 INFO L226 Difference]: Without dead ends: 527 [2022-03-15 16:04:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:04:14,650 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 519 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 936 Invalid, 0 Unknown, 125 Unchecked, 0.4s Time] [2022-03-15 16:04:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-15 16:04:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 380. [2022-03-15 16:04:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7150395778364116) internal successors, (1029), 379 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1029 transitions. [2022-03-15 16:04:14,654 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1029 transitions. Word has length 18 [2022-03-15 16:04:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1029 transitions. [2022-03-15 16:04:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1029 transitions. [2022-03-15 16:04:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:14,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:14,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:14,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-15 16:04:14,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-03-15 16:04:14,855 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 772283947, now seen corresponding path program 214 times [2022-03-15 16:04:14,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:14,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601065446] [2022-03-15 16:04:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:14,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:15,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:15,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601065446] [2022-03-15 16:04:15,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601065446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:15,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569780491] [2022-03-15 16:04:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:04:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:15,100 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 16:04:15,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:04:15,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:16,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:16,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 289 [2022-03-15 16:04:16,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:16,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 293 treesize of output 249 [2022-03-15 16:04:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:16,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:18,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:18,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 495 treesize of output 425 [2022-03-15 16:04:18,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:18,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 419 treesize of output 357 [2022-03-15 16:04:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:19,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569780491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:19,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:19,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:19,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502195189] [2022-03-15 16:04:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:19,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:19,231 INFO L87 Difference]: Start difference. First operand 380 states and 1029 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:20,792 INFO L93 Difference]: Finished difference Result 544 states and 1302 transitions. [2022-03-15 16:04:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:04:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:20,794 INFO L225 Difference]: With dead ends: 544 [2022-03-15 16:04:20,794 INFO L226 Difference]: Without dead ends: 531 [2022-03-15 16:04:20,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:04:20,794 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:20,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 497 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 950 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-03-15 16:04:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-15 16:04:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 372. [2022-03-15 16:04:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.7277628032345014) internal successors, (1012), 371 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1012 transitions. [2022-03-15 16:04:20,798 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1012 transitions. Word has length 18 [2022-03-15 16:04:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:20,798 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1012 transitions. [2022-03-15 16:04:20,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1012 transitions. [2022-03-15 16:04:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:20,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:20,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:20,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-15 16:04:20,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:20,999 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1579381285, now seen corresponding path program 215 times [2022-03-15 16:04:21,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:21,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075555495] [2022-03-15 16:04:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:21,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:21,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075555495] [2022-03-15 16:04:21,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075555495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:21,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505757093] [2022-03-15 16:04:21,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:04:21,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:21,267 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 16:04:21,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:04:21,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:21,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:22,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:22,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 187 [2022-03-15 16:04:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:22,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 167 [2022-03-15 16:04:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:22,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:24,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:24,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 374 [2022-03-15 16:04:24,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:24,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 324 [2022-03-15 16:04:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:25,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505757093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:25,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:25,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:25,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664873240] [2022-03-15 16:04:25,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:25,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:25,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:25,131 INFO L87 Difference]: Start difference. First operand 372 states and 1012 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:26,741 INFO L93 Difference]: Finished difference Result 566 states and 1351 transitions. [2022-03-15 16:04:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:04:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:26,742 INFO L225 Difference]: With dead ends: 566 [2022-03-15 16:04:26,742 INFO L226 Difference]: Without dead ends: 549 [2022-03-15 16:04:26,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:04:26,742 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:26,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 542 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 840 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-03-15 16:04:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-15 16:04:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 381. [2022-03-15 16:04:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.721052631578947) internal successors, (1034), 380 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1034 transitions. [2022-03-15 16:04:26,747 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1034 transitions. Word has length 18 [2022-03-15 16:04:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:26,747 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1034 transitions. [2022-03-15 16:04:26,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1034 transitions. [2022-03-15 16:04:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:26,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:26,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:26,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-15 16:04:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:26,948 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1407486041, now seen corresponding path program 216 times [2022-03-15 16:04:26,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:26,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742885051] [2022-03-15 16:04:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:27,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:27,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742885051] [2022-03-15 16:04:27,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742885051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201704258] [2022-03-15 16:04:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:04:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:27,186 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 16:04:27,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:04:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:28,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:28,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 269 [2022-03-15 16:04:28,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:28,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 233 [2022-03-15 16:04:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:29,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:30,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:30,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 561 treesize of output 487 [2022-03-15 16:04:30,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:30,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 423 [2022-03-15 16:04:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:31,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201704258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:31,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:31,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:04:31,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160396705] [2022-03-15 16:04:31,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:31,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:31,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:31,706 INFO L87 Difference]: Start difference. First operand 381 states and 1034 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:33,495 INFO L93 Difference]: Finished difference Result 565 states and 1340 transitions. [2022-03-15 16:04:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:04:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:33,496 INFO L225 Difference]: With dead ends: 565 [2022-03-15 16:04:33,496 INFO L226 Difference]: Without dead ends: 555 [2022-03-15 16:04:33,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:04:33,497 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:33,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 385 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 761 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-03-15 16:04:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-15 16:04:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 374. [2022-03-15 16:04:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.7292225201072386) internal successors, (1018), 373 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) [2022-03-15 16:04:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1018 transitions. [2022-03-15 16:04:33,501 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1018 transitions. Word has length 18 [2022-03-15 16:04:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:33,501 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1018 transitions. [2022-03-15 16:04:33,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1018 transitions. [2022-03-15 16:04:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:33,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:33,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:33,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:33,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-15 16:04:33,702 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash -679865121, now seen corresponding path program 217 times [2022-03-15 16:04:33,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:33,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501714946] [2022-03-15 16:04:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:33,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:33,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:33,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501714946] [2022-03-15 16:04:33,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501714946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:33,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097015471] [2022-03-15 16:04:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:04:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:33,972 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:33,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 16:04:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:34,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:34,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 204 treesize of output 176 [2022-03-15 16:04:34,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:34,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 180 treesize of output 156 [2022-03-15 16:04:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:37,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:37,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 498 treesize of output 428 [2022-03-15 16:04:37,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:37,692 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 422 treesize of output 356 [2022-03-15 16:04:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:38,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097015471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:38,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:38,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 16:04:38,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086194672] [2022-03-15 16:04:38,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:38,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:04:38,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:38,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:04:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:04:38,674 INFO L87 Difference]: Start difference. First operand 374 states and 1018 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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) [2022-03-15 16:04:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:43,598 INFO L93 Difference]: Finished difference Result 679 states and 1526 transitions. [2022-03-15 16:04:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:04:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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 18 [2022-03-15 16:04:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:43,599 INFO L225 Difference]: With dead ends: 679 [2022-03-15 16:04:43,599 INFO L226 Difference]: Without dead ends: 639 [2022-03-15 16:04:43,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:04:43,600 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 120 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 426 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 912 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-03-15 16:04:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-15 16:04:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 370. [2022-03-15 16:04:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.731707317073171) internal successors, (1008), 369 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1008 transitions. [2022-03-15 16:04:43,604 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1008 transitions. Word has length 18 [2022-03-15 16:04:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1008 transitions. [2022-03-15 16:04:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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) [2022-03-15 16:04:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1008 transitions. [2022-03-15 16:04:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:43,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:43,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:43,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:43,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-15 16:04:43,815 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -728308717, now seen corresponding path program 218 times [2022-03-15 16:04:43,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:43,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720039762] [2022-03-15 16:04:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:44,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:44,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720039762] [2022-03-15 16:04:44,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720039762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:44,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072275446] [2022-03-15 16:04:44,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:04:44,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:44,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:44,029 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:44,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 16:04:44,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:44,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:44,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:04:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:45,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:45,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 340 treesize of output 292 [2022-03-15 16:04:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:45,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 279 treesize of output 241 [2022-03-15 16:04:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:45,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:47,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:47,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 307 [2022-03-15 16:04:47,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:47,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 271 [2022-03-15 16:04:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:47,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072275446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:47,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:47,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:04:47,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803589516] [2022-03-15 16:04:47,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:47,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:04:47,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:04:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:04:47,971 INFO L87 Difference]: Start difference. First operand 370 states and 1008 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:04:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:48,615 INFO L93 Difference]: Finished difference Result 436 states and 1127 transitions. [2022-03-15 16:04:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:04:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:48,616 INFO L225 Difference]: With dead ends: 436 [2022-03-15 16:04:48,616 INFO L226 Difference]: Without dead ends: 415 [2022-03-15 16:04:48,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:04:48,616 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:48,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 224 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 595 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-03-15 16:04:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-15 16:04:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 379. [2022-03-15 16:04:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.7222222222222223) internal successors, (1029), 378 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1029 transitions. [2022-03-15 16:04:48,620 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1029 transitions. Word has length 18 [2022-03-15 16:04:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:48,620 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1029 transitions. [2022-03-15 16:04:48,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:04:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1029 transitions. [2022-03-15 16:04:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:48,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:48,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:48,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-15 16:04:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-15 16:04:48,821 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -574847499, now seen corresponding path program 219 times [2022-03-15 16:04:48,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:48,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837742206] [2022-03-15 16:04:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:49,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:49,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837742206] [2022-03-15 16:04:49,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837742206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:49,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151119866] [2022-03-15 16:04:49,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:04:49,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:49,050 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:49,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 16:04:49,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:04:49,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:49,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:49,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:49,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 187 [2022-03-15 16:04:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:49,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 169 [2022-03-15 16:04:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:50,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:52,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:52,279 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 452 treesize of output 398 [2022-03-15 16:04:52,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:52,289 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 392 treesize of output 326 [2022-03-15 16:04:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:53,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151119866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:53,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:53,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:04:53,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242266014] [2022-03-15 16:04:53,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:53,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:04:53,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:04:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:04:53,015 INFO L87 Difference]: Start difference. First operand 379 states and 1029 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:04:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:54,281 INFO L93 Difference]: Finished difference Result 536 states and 1297 transitions. [2022-03-15 16:04:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:04:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:04:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:54,282 INFO L225 Difference]: With dead ends: 536 [2022-03-15 16:04:54,282 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 16:04:54,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:04:54,283 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:54,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 345 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 624 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2022-03-15 16:04:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 16:04:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 384. [2022-03-15 16:04:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.731070496083551) internal successors, (1046), 383 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1046 transitions. [2022-03-15 16:04:54,287 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1046 transitions. Word has length 18 [2022-03-15 16:04:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1046 transitions. [2022-03-15 16:04:54,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:04:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1046 transitions. [2022-03-15 16:04:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:04:54,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:54,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:54,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-15 16:04:54,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-15 16:04:54,488 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:04:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2008562541, now seen corresponding path program 220 times [2022-03-15 16:04:54,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:54,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395425056] [2022-03-15 16:04:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:54,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395425056] [2022-03-15 16:04:54,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395425056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769329422] [2022-03-15 16:04:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:04:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:54,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:54,717 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:54,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 16:04:54,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:04:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:04:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:55,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:55,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 243 treesize of output 207 [2022-03-15 16:04:55,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:55,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-03-15 16:04:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:56,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:57,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:57,757 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 477 treesize of output 435 [2022-03-15 16:04:57,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:57,767 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 429 treesize of output 379 [2022-03-15 16:04:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:58,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769329422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:58,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:58,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:04:58,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458758723] [2022-03-15 16:04:58,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:58,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:04:58,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:04:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:04:58,516 INFO L87 Difference]: Start difference. First operand 384 states and 1046 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:00,819 INFO L93 Difference]: Finished difference Result 616 states and 1442 transitions. [2022-03-15 16:05:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:05:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:00,820 INFO L225 Difference]: With dead ends: 616 [2022-03-15 16:05:00,820 INFO L226 Difference]: Without dead ends: 569 [2022-03-15 16:05:00,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=296, Invalid=2254, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:05:00,820 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:00,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 336 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 799 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-03-15 16:05:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-15 16:05:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 384. [2022-03-15 16:05:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.7258485639686683) internal successors, (1044), 383 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1044 transitions. [2022-03-15 16:05:00,825 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1044 transitions. Word has length 18 [2022-03-15 16:05:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:00,825 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1044 transitions. [2022-03-15 16:05:00,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1044 transitions. [2022-03-15 16:05:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:00,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:00,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:00,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:01,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-15 16:05:01,026 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash -241189485, now seen corresponding path program 221 times [2022-03-15 16:05:01,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:01,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740311258] [2022-03-15 16:05:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:01,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:01,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740311258] [2022-03-15 16:05:01,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740311258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:01,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435686839] [2022-03-15 16:05:01,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:05:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:01,272 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:01,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 16:05:01,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:05:01,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:02,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 230 [2022-03-15 16:05:02,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:02,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 202 [2022-03-15 16:05:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:04,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:04,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 429 treesize of output 371 [2022-03-15 16:05:04,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:04,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 365 treesize of output 311 [2022-03-15 16:05:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:04,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435686839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:04,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:04,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:05:04,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635367367] [2022-03-15 16:05:04,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:04,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:04,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:04,882 INFO L87 Difference]: Start difference. First operand 384 states and 1044 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:05,854 INFO L93 Difference]: Finished difference Result 555 states and 1402 transitions. [2022-03-15 16:05:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:05:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:05,855 INFO L225 Difference]: With dead ends: 555 [2022-03-15 16:05:05,855 INFO L226 Difference]: Without dead ends: 538 [2022-03-15 16:05:05,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:05:05,856 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:05,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 340 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 738 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-03-15 16:05:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-15 16:05:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 424. [2022-03-15 16:05:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.75177304964539) internal successors, (1164), 423 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1164 transitions. [2022-03-15 16:05:05,861 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1164 transitions. Word has length 18 [2022-03-15 16:05:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:05,861 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1164 transitions. [2022-03-15 16:05:05,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1164 transitions. [2022-03-15 16:05:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:05,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:05,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:05,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-15 16:05:06,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:06,062 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:06,062 INFO L85 PathProgramCache]: Analyzing trace with hash -69294241, now seen corresponding path program 222 times [2022-03-15 16:05:06,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:06,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842278692] [2022-03-15 16:05:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:06,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:06,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842278692] [2022-03-15 16:05:06,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842278692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:06,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695137747] [2022-03-15 16:05:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:05:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:06,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:06,286 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:06,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 16:05:06,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:05:06,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:06,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:06,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:07,544 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 285 [2022-03-15 16:05:07,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:07,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 247 [2022-03-15 16:05:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:07,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:09,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:09,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 513 treesize of output 463 [2022-03-15 16:05:09,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 457 treesize of output 375 [2022-03-15 16:05:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:11,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695137747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:11,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:11,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:05:11,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653534931] [2022-03-15 16:05:11,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:11,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:11,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:11,322 INFO L87 Difference]: Start difference. First operand 424 states and 1164 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:12,342 INFO L93 Difference]: Finished difference Result 565 states and 1402 transitions. [2022-03-15 16:05:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:05:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:12,343 INFO L225 Difference]: With dead ends: 565 [2022-03-15 16:05:12,343 INFO L226 Difference]: Without dead ends: 552 [2022-03-15 16:05:12,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:05:12,343 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 67 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:12,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 364 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 781 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-03-15 16:05:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-03-15 16:05:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 414. [2022-03-15 16:05:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.767554479418886) internal successors, (1143), 413 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1143 transitions. [2022-03-15 16:05:12,348 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1143 transitions. Word has length 18 [2022-03-15 16:05:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:12,348 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1143 transitions. [2022-03-15 16:05:12,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1143 transitions. [2022-03-15 16:05:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:12,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:12,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:12,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-15 16:05:12,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-15 16:05:12,549 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1874007823, now seen corresponding path program 223 times [2022-03-15 16:05:12,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:12,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144865096] [2022-03-15 16:05:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:12,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:12,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144865096] [2022-03-15 16:05:12,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144865096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:12,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498463860] [2022-03-15 16:05:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:05:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:12,764 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:12,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 16:05:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:14,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 382 treesize of output 318 [2022-03-15 16:05:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:14,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 284 [2022-03-15 16:05:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:16,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:16,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 345 [2022-03-15 16:05:16,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:16,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 309 [2022-03-15 16:05:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:16,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498463860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:16,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:16,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:05:16,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606900908] [2022-03-15 16:05:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:16,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:16,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:16,877 INFO L87 Difference]: Start difference. First operand 414 states and 1143 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:18,063 INFO L93 Difference]: Finished difference Result 553 states and 1389 transitions. [2022-03-15 16:05:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:05:18,063 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:18,064 INFO L225 Difference]: With dead ends: 553 [2022-03-15 16:05:18,064 INFO L226 Difference]: Without dead ends: 533 [2022-03-15 16:05:18,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:05:18,064 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:18,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 355 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 651 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-03-15 16:05:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-15 16:05:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 416. [2022-03-15 16:05:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.7686746987951807) internal successors, (1149), 415 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1149 transitions. [2022-03-15 16:05:18,069 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1149 transitions. Word has length 18 [2022-03-15 16:05:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:18,069 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1149 transitions. [2022-03-15 16:05:18,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-03-15 16:05:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1149 transitions. [2022-03-15 16:05:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:18,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:18,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:18,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-15 16:05:18,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-15 16:05:18,270 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1521443309, now seen corresponding path program 224 times [2022-03-15 16:05:18,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:18,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610067492] [2022-03-15 16:05:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:18,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610067492] [2022-03-15 16:05:18,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610067492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703587324] [2022-03-15 16:05:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:05:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:18,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:18,507 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:18,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 16:05:18,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:05:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:19,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 212 [2022-03-15 16:05:19,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:19,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 216 treesize of output 188 [2022-03-15 16:05:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:20,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:21,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:21,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 428 treesize of output 378 [2022-03-15 16:05:21,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:21,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 334 [2022-03-15 16:05:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:22,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703587324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:22,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:22,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:05:22,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617571257] [2022-03-15 16:05:22,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:22,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:05:22,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:05:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:05:22,400 INFO L87 Difference]: Start difference. First operand 416 states and 1149 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 16:05:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:23,632 INFO L93 Difference]: Finished difference Result 616 states and 1508 transitions. [2022-03-15 16:05:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:05:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:23,633 INFO L225 Difference]: With dead ends: 616 [2022-03-15 16:05:23,633 INFO L226 Difference]: Without dead ends: 583 [2022-03-15 16:05:23,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:05:23,633 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:23,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 426 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 937 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-03-15 16:05:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-15 16:05:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 416. [2022-03-15 16:05:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.766265060240964) internal successors, (1148), 415 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1148 transitions. [2022-03-15 16:05:23,639 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1148 transitions. Word has length 18 [2022-03-15 16:05:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:23,639 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1148 transitions. [2022-03-15 16:05:23,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 16:05:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1148 transitions. [2022-03-15 16:05:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:23,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:23,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:23,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-15 16:05:23,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:23,840 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash 861315291, now seen corresponding path program 225 times [2022-03-15 16:05:23,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:23,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196915052] [2022-03-15 16:05:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:24,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:24,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196915052] [2022-03-15 16:05:24,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196915052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:24,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687564787] [2022-03-15 16:05:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:05:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:24,039 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:24,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 16:05:24,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:05:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:24,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 165 [2022-03-15 16:05:24,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-03-15 16:05:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:26,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:26,479 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 340 [2022-03-15 16:05:26,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:26,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 308 [2022-03-15 16:05:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:27,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687564787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:27,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:27,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:05:27,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388233047] [2022-03-15 16:05:27,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:27,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:27,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:27,141 INFO L87 Difference]: Start difference. First operand 416 states and 1148 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:28,846 INFO L93 Difference]: Finished difference Result 573 states and 1419 transitions. [2022-03-15 16:05:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:05:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:28,848 INFO L225 Difference]: With dead ends: 573 [2022-03-15 16:05:28,848 INFO L226 Difference]: Without dead ends: 546 [2022-03-15 16:05:28,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:05:28,848 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:28,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 404 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:05:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-15 16:05:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 416. [2022-03-15 16:05:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.763855421686747) internal successors, (1147), 415 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1147 transitions. [2022-03-15 16:05:28,853 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1147 transitions. Word has length 18 [2022-03-15 16:05:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:28,853 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1147 transitions. [2022-03-15 16:05:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1147 transitions. [2022-03-15 16:05:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:28,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:28,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:28,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-15 16:05:29,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:29,054 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1760831455, now seen corresponding path program 226 times [2022-03-15 16:05:29,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:29,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533932235] [2022-03-15 16:05:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:29,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:29,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533932235] [2022-03-15 16:05:29,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533932235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:29,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549009678] [2022-03-15 16:05:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:05:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:29,250 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 16:05:29,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:05:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:29,899 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 358 treesize of output 322 [2022-03-15 16:05:29,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 272 [2022-03-15 16:05:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:30,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:31,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:31,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 403 treesize of output 371 [2022-03-15 16:05:31,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:31,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 331 [2022-03-15 16:05:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:32,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549009678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:32,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:32,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 16:05:32,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067910992] [2022-03-15 16:05:32,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:32,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:32,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:32,683 INFO L87 Difference]: Start difference. First operand 416 states and 1147 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:35,184 INFO L93 Difference]: Finished difference Result 647 states and 1533 transitions. [2022-03-15 16:05:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:05:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:35,185 INFO L225 Difference]: With dead ends: 647 [2022-03-15 16:05:35,185 INFO L226 Difference]: Without dead ends: 607 [2022-03-15 16:05:35,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:05:35,185 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 115 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:35,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 448 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:05:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-15 16:05:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 419. [2022-03-15 16:05:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.7679425837320575) internal successors, (1157), 418 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1157 transitions. [2022-03-15 16:05:35,190 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1157 transitions. Word has length 18 [2022-03-15 16:05:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:35,191 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1157 transitions. [2022-03-15 16:05:35,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1157 transitions. [2022-03-15 16:05:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:35,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:35,191 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:35,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-15 16:05:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:35,392 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -317765739, now seen corresponding path program 227 times [2022-03-15 16:05:35,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:35,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863325652] [2022-03-15 16:05:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:35,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:35,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863325652] [2022-03-15 16:05:35,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863325652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:35,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884229180] [2022-03-15 16:05:35,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:05:35,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:35,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:35,488 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:35,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 16:05:35,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:05:35,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:05:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:35,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:35,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 16:05:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:35,895 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:05:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:36,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:36,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 16:05:36,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:36,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 16:05:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:36,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884229180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:36,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:36,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:05:36,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197142836] [2022-03-15 16:05:36,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:36,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:05:36,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:05:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:05:36,129 INFO L87 Difference]: Start difference. First operand 419 states and 1157 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:36,234 INFO L93 Difference]: Finished difference Result 445 states and 1209 transitions. [2022-03-15 16:05:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:05:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:36,235 INFO L225 Difference]: With dead ends: 445 [2022-03-15 16:05:36,235 INFO L226 Difference]: Without dead ends: 445 [2022-03-15 16:05:36,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:05:36,235 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:36,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 60 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-03-15 16:05:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-15 16:05:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 420. [2022-03-15 16:05:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.768496420047733) internal successors, (1160), 419 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1160 transitions. [2022-03-15 16:05:36,240 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1160 transitions. Word has length 18 [2022-03-15 16:05:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:36,240 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1160 transitions. [2022-03-15 16:05:36,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1160 transitions. [2022-03-15 16:05:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:36,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:36,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:36,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-15 16:05:36,443 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1458424685, now seen corresponding path program 228 times [2022-03-15 16:05:36,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:36,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713969752] [2022-03-15 16:05:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:36,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:36,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713969752] [2022-03-15 16:05:36,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713969752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:36,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316006035] [2022-03-15 16:05:36,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:05:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:36,636 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 16:05:36,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:05:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:37,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 217 [2022-03-15 16:05:37,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 191 [2022-03-15 16:05:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:37,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:39,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:39,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 288 [2022-03-15 16:05:39,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:39,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 256 [2022-03-15 16:05:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:40,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316006035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:40,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:40,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:05:40,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764528266] [2022-03-15 16:05:40,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:40,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:40,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:40,438 INFO L87 Difference]: Start difference. First operand 420 states and 1160 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:43,376 INFO L93 Difference]: Finished difference Result 658 states and 1562 transitions. [2022-03-15 16:05:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:05:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:43,377 INFO L225 Difference]: With dead ends: 658 [2022-03-15 16:05:43,377 INFO L226 Difference]: Without dead ends: 618 [2022-03-15 16:05:43,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:05:43,377 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 518 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:05:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-15 16:05:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 416. [2022-03-15 16:05:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.7590361445783134) internal successors, (1145), 415 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1145 transitions. [2022-03-15 16:05:43,383 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1145 transitions. Word has length 18 [2022-03-15 16:05:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:43,383 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1145 transitions. [2022-03-15 16:05:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1145 transitions. [2022-03-15 16:05:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:43,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:43,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:43,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 16:05:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:43,584 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1292670811, now seen corresponding path program 229 times [2022-03-15 16:05:43,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:43,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883432320] [2022-03-15 16:05:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:43,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:43,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883432320] [2022-03-15 16:05:43,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883432320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:43,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699582454] [2022-03-15 16:05:43,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:05:43,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:43,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:43,789 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:43,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 16:05:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:43,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:44,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 165 [2022-03-15 16:05:44,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 147 [2022-03-15 16:05:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:44,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:46,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:46,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 370 [2022-03-15 16:05:46,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:46,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 334 [2022-03-15 16:05:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:46,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699582454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:46,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:46,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:05:46,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911735095] [2022-03-15 16:05:46,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:46,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:46,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:46,813 INFO L87 Difference]: Start difference. First operand 416 states and 1145 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:47,801 INFO L93 Difference]: Finished difference Result 567 states and 1435 transitions. [2022-03-15 16:05:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:05:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:05:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:47,802 INFO L225 Difference]: With dead ends: 567 [2022-03-15 16:05:47,802 INFO L226 Difference]: Without dead ends: 547 [2022-03-15 16:05:47,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:05:47,802 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:47,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 365 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:05:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-15 16:05:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 435. [2022-03-15 16:05:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.769585253456221) internal successors, (1202), 434 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) [2022-03-15 16:05:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1202 transitions. [2022-03-15 16:05:47,807 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1202 transitions. Word has length 18 [2022-03-15 16:05:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:47,807 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1202 transitions. [2022-03-15 16:05:47,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1202 transitions. [2022-03-15 16:05:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:05:47,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:47,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:47,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-15 16:05:48,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:48,008 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:05:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2102780321, now seen corresponding path program 230 times [2022-03-15 16:05:48,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:48,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430192333] [2022-03-15 16:05:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:48,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:48,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430192333] [2022-03-15 16:05:48,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430192333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:48,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741617133] [2022-03-15 16:05:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:05:48,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:48,196 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:48,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 16:05:48,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:05:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:05:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:48,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 240 [2022-03-15 16:05:48,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 218 [2022-03-15 16:05:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:49,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-15 16:05:49,913 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:05:49,916 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:05:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-15 16:05:49,949 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:05:49,951 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:05:50,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 16:05:50,117 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 1ms.. [2022-03-15 16:05:50,118 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:05:50,118 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:05:50,121 INFO L732 BasicCegarLoop]: Path program histogram: [230, 2, 1, 1, 1, 1] [2022-03-15 16:05:50,122 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:05:50,123 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:05:50,124 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:05:50 BasicIcfg [2022-03-15 16:05:50,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:05:50,124 INFO L158 Benchmark]: Toolchain (without parser) took 752589.33ms. Allocated memory was 198.2MB in the beginning and 550.5MB in the end (delta: 352.3MB). Free memory was 162.0MB in the beginning and 453.5MB in the end (delta: -291.5MB). Peak memory consumption was 325.3MB. Max. memory is 8.0GB. [2022-03-15 16:05:50,124 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 163.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:05:50,125 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.34ms. Allocated memory is still 198.2MB. Free memory was 161.9MB in the beginning and 160.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:05:50,125 INFO L158 Benchmark]: Boogie Preprocessor took 11.99ms. Allocated memory is still 198.2MB. Free memory was 160.4MB in the beginning and 159.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:05:50,125 INFO L158 Benchmark]: RCFGBuilder took 246.69ms. Allocated memory is still 198.2MB. Free memory was 159.3MB in the beginning and 145.3MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-15 16:05:50,125 INFO L158 Benchmark]: TraceAbstraction took 752298.55ms. Allocated memory was 198.2MB in the beginning and 550.5MB in the end (delta: 352.3MB). Free memory was 144.8MB in the beginning and 453.5MB in the end (delta: -308.7MB). Peak memory consumption was 307.5MB. Max. memory is 8.0GB. [2022-03-15 16:05:50,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 163.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.34ms. Allocated memory is still 198.2MB. Free memory was 161.9MB in the beginning and 160.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.99ms. Allocated memory is still 198.2MB. Free memory was 160.4MB in the beginning and 159.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.69ms. Allocated memory is still 198.2MB. Free memory was 159.3MB in the beginning and 145.3MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 752298.55ms. Allocated memory was 198.2MB in the beginning and 550.5MB in the end (delta: 352.3MB). Free memory was 144.8MB in the beginning and 453.5MB in the end (delta: -308.7MB). Peak memory consumption was 307.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 1ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 1ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 752.2s, OverallIterations: 236, TraceHistogramMax: 4, PathProgramHistogramMax: 230, EmptinessCheckTime: 0.1s, AutomataDifference: 174.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14494 SdHoareTripleChecker+Valid, 47.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14494 mSDsluCounter, 42854 SdHoareTripleChecker+Invalid, 39.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11161 IncrementalHoareTripleChecker+Unchecked, 72376 mSDsCounter, 5072 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102938 IncrementalHoareTripleChecker+Invalid, 119171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5072 mSolverCounterUnsat, 3623 mSDtfsCounter, 102938 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11414 GetRequests, 4742 SyntacticMatches, 554 SemanticMatches, 6118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41457 ImplicationChecksByTransitivity, 203.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=235, InterpolantAutomatonStates: 4268, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 235 MinimizatonAttempts, 15878 StatesRemovedByMinimization, 231 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 500.9s InterpolantComputationTime, 7698 NumberOfCodeBlocks, 7698 NumberOfCodeBlocksAsserted, 759 NumberOfCheckSat, 10821 ConstructedInterpolants, 556 QuantifiedInterpolants, 249002 SizeOfPredicates, 2644 NumberOfNonLiveVariables, 17398 ConjunctsInSsa, 5510 ConjunctsInUnsatCore, 693 InterpolantComputations, 6 PerfectInterpolantSequences, 672/5645 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown